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A fish finder is a great tool, but fish were being caught long before they existed. Understanding lake structure, cover, and seasonal patterns lets you narrow down where fish will be — often before you make your first cast. Here’s how to read a lake the old-fashioned way.

Start with a map

Most lakes have contour maps (bathymetric charts) available through state fish and wildlife agencies, fishing apps, or the marina. These show depth contours, underwater points, humps, channels, and basins — all fish-holding structure. Before you ever get on the water, mark the most promising spots: depth transitions (where the bottom drops quickly), points extending into deeper water, inside corners of coves, and saddles between two humps.

What fish look for

Fish position themselves where three needs overlap: food, cover, and comfort (the right water temperature and oxygen level). In practice, this means they’ll be near cover that holds baitfish — weededges, fallen trees, dock pilings, bridge abutments, rock piles — at a depth where the water temperature is in their preferred range. The transition zone where the temperature changes is often a productive horizontal band; in summer that band is usually 15–25 feet down in most lakes.

Reading the shoreline

The shoreline tells you a lot about what’s happening underwater. A hard, rocky point on shore usually continues as a rocky point below the surface — classic ambush cover for predators. A muddy, flat bank usually means a flat, featureless bottom — lower odds. Visible weed edges, fallen timber, and overhanging banks all hold fish in the right conditions. Any place where two different types of bottom or cover meet is a prime target.

Seasonal patterns to follow

Season	Where to look
Spring	Shallow bays, dark-bottomed flats, creek arms — fish move shallow to spawn
Early summer	Weededges, points, transitions from shallow to deep
Midsummer	Deeper structure at the thermocline — except at dawn and dusk
Fall	Shallows again as water cools — fish chase baitfish onto flats
Winter	Deepest basins with stable temperature; slow down presentations

Use water temperature as a guide

Each species has a preferred temperature range, and fish will position themselves at the depth where that temperature exists. Our free water temperature species guide shows which gamefish are in their prime, active, or slow range for any water temperature — a quick way to know what to target before you choose where to fish.

Related from Fishing Toolbox

• The Best Water Temperature for Every Gamefish
• Why Dawn and Dusk Are the Best Times to Fish

Brook trout are the wild jewels of cold, clean streams — compact, beautiful, and worth handling fast for a quick release. This brook trout length-to-weight chart gives average weights for wild brookies, so you can size up your catch without keeping it out of the water.

Brook trout length-to-weight chart

These figures use weight (lb) = length³ ÷ 2,700 (length in inches). Brook trout are slightly deeper-bodied than rainbow trout, so the divisor is a touch lower than for rainbows.

Length	Average weight
6″	0.08 lb
7″	0.13 lb
8″	0.19 lb
9″	0.27 lb
10″	0.37 lb
12″	0.64 lb
14″	1.02 lb
16″	1.52 lb
18″	2.16 lb

What’s an average brook trout — and what’s a trophy?

Brook trout size is highly regional. In small native Appalachian headwater streams, a typical adult is only 6–10 inches and a 12-inch brookie is a genuine trophy. In larger rivers, lakes, and northern (Canadian) systems — including lake-run “coasters” — they reach several pounds, and there an 18-inch or 3–5 lb fish is the trophy mark. The IGFA all-tackle record is 14 lb 8 oz, caught in Ontario’s Nipigon River in 1915 — one of the oldest records in the sport (some accounts say the fish was even heavier before the long trip to be weighed).

Put a number on your exact fish (worked example)

Because brook trout size varies so much by water, girth is the honest way to weigh yours:

Weight (lb) = Length × Girth² ÷ 800

A wild 12-inch brookie with a 7-inch girth works out to 12 × 7 × 7 ÷ 800 = 0.74 lb — a bit above the 0.64 lb length-only average for a hard-bodied stream fish. Measure both and use the free fish weight calculator for a number that fits your fish, not just its length; see how to estimate a fish’s weight.

Wild vs. hatchery brook trout

Hatchery brookies raised on pellets in low-activity tanks are often 10–15% heavier than wild fish of the same length. Wild fish from fast, cold streams burn more energy and run leaner — another reason to trust girth over a length-only average.

Where and when to find bigger brook trout

Brook trout are the most cold- and clean-water-demanding of the common trout — clear, cold, well-oxygenated streams and lakes around 55–60°F, with shade, cover, and clean gravel. They die off in sustained water above ~72°F, which makes them an indicator of pristine water. Bigger fish live in larger, more fertile rivers and lake systems. ID: unmistakable worm-like (vermiculate) markings on the back, red spots with blue halos, and white-edged lower fins.

Brook trout weight FAQ

What’s a trophy brook trout? In small streams, 12 inches; in big rivers/lakes, 3–5 lb or 18+ inches.

Why are stream brook trout so small? Cold, clean water tends to be low in nutrients, so growth is slow — a 10-incher can be several years old.

Is a brook trout really a trout? Technically it’s a char, a close relative — but it fishes and tastes like the trout everyone knows.

Related from Fishing Toolbox

• Rainbow Trout Length to Weight Chart
• The Best Water Temperature for Every Gamefish

White crappie are close relatives of black crappie but tend to be slightly longer and leaner. This white crappie length-to-weight chart gives average weights you can use right at the water — especially handy when you’re deciding if a fish meets a slot limit or tournament minimum.

White crappie length-to-weight chart

These figures use weight (lb) = length³ ÷ 1,800 (length in inches), which reflects white crappie’s slightly leaner body compared to black crappie and matches published fisheries data well.

Length	Average weight
8″	0.28 lb
9″	0.41 lb
10″	0.56 lb
11″	0.74 lb
12″	0.96 lb
13″	1.22 lb
14″	1.52 lb
15″	1.88 lb

What’s an average white crappie — and what’s a trophy?

Practical sizes match black crappie: most run 8–12 inches and about ½ to 1 pound, with 13–15 inches and ~2 pounds the trophy/slab benchmark (an angler convention, with many state citations near 15 inches). The white crappie record is 5 lb 3 oz, caught below Enid Dam in Mississippi in 1957 — a mark that has stood for nearly 70 years, and just 4 ounces shy of the black crappie record.

White crappie vs. black crappie

At the same length, black crappie are typically a few tenths of a pound heavier because they have a deeper, more rounded body — which is why we use a separate chart for each. ID tip: white crappie have only 5–6 dorsal spines and show distinct vertical bars on a paler, more elongated body, versus the black crappie’s random speckling. Dorsal-spine count is the definitive check.

Put a number on your exact fish (worked example)

Weight (lb) = Length × Girth² ÷ 800

A 13-inch white crappie with a 9-inch girth comes out to 13 × 9 × 9 ÷ 800 = 1.3 lb, a touch over the 1.22 lb chart average. Measure length and girth and let the free fish weight calculator handle it; see how to estimate a fish’s weight.

Why your fish may weigh more or less

White crappie from highly productive, well-managed lakes run heavier than the table; fish from crowded or low-fertility water run lean. Crappie bulk up before the spawn and are among the heaviest they’ll be all year in early spring, then slim down until midsummer feeding picks back up.

Where and when to find bigger white crappie

White crappie tolerate murkier, more turbid water better than black crappie and favor shallows with woody cover — brush and timber in rivers and reservoirs. They lean more heavily on small baitfish in their diet. Spring pre-spawn in stained water (~62–68°F) is the prime window.

White crappie weight FAQ

How much does a 14-inch white crappie weigh? About 1.5 pounds in average condition.

Is a white crappie lighter than a black crappie? Slightly, at the same length — a leaner body.

How do I tell them apart? Count dorsal spines: white have 5–6 and vertical bars; black have 7–8 and scattered spots.

Related from Fishing Toolbox

• Black Crappie Length to Weight Chart
• Bluegill Length to Weight Chart

Rain puts a lot of anglers off the water — which is exactly why it’s worth fishing. Rain changes conditions in ways that often improve the bite, and with the right approach, a rainy day can be one of the most productive trips of the season.

Why rain often turns fish on

Rain breaking the water surface breaks up light and disrupts the mirror effect that makes shallow fish spooky. Predators that would hold in deeper water or tight to cover on a bright day move into the shallows to feed. Rain also washes insects and baitfish off banks and into the water, triggering an opportunistic feeding response — especially along shorelines and the mouths of small tributaries that come alive after rain.

Before the storm vs. during vs. after

Timing	What to expect
Before the rain	Often excellent — dropping pressure triggers aggressive feeding
During light rain	Very good — low light, active fish in shallows
During heavy rain	Mixed — runoff muddies water; fish may go deep or hold tight to structure
Right after rain	Good — water clears, fish resume feeding; check tributary mouths
Post-front clearing	Tough — bright skies and rising pressure shut the bite down

Where to fish in the rain

During light rain, fish move shallow — target banks, weededges, and the upper end of bays. In heavier rain with significant runoff, any creek mouth or drainage flowing into the main body of water becomes a magnet. Baitfish concentrate there, and predators follow. In rivers, rising water pushes fish out of the main current into eddies and slack-water pockets — look for anything that blocks the current flow.

Best baits and lures for rainy conditions

Noise and vibration help fish find lures in broken, rippled water — spinnerbaits, chatterbaits, and rattling crankbaits all work well. Topwater lures can be surprisingly effective in light rain when bass are in the shallows; the pattering rain on the surface masks the lure’s commotion and gives fish confidence to commit. In muddy water from heavy runoff, go to bright colors (chartreuse, white, orange) and baits that move a lot of water, so fish can find them by their lateral line.

Safety on the water

Light rain is fine to fish through. Thunder or lightning means get off the water immediately — a fishing rod is a perfect lightning conductor. Watch for rapidly rising water in rivers and streams, which can become dangerous in minutes during heavy rain. Check the forecast before heading out and have a plan for getting off the water quickly if conditions change.

Related from Fishing Toolbox

• Why Dawn and Dusk Are the Best Times to Fish
• The Best Water Temperature for Every Gamefish

Anglers have tracked the moon for centuries, and fisheries research backs them up — the moon does affect feeding activity. The key is understanding which phase matters, and what it means for the fish you’re targeting.

How the moon affects fish

The moon exerts gravitational pull on water, driving tides in saltwater and — to a lesser extent — affecting currents and pressure in freshwater. More importantly, the lunar cycle controls light levels at night. A full moon lights up shallow water all night long, which changes how and where baitfish and predators move. Fish that are sensitive to light tend to move deeper or feed more cautiously under a bright full moon; those same fish may go on a feeding binge the night before or after the peak.

The four phases and what they mean for fishing

Moon phase	Fishing tendency
New moon	Often excellent — dark nights push fish to feed harder in shallows
First quarter	Good — rising light, fish transitioning feeding windows
Full moon	Variable — saltwater fishing peaks; freshwater fish may feed at night and rest by day
Last quarter	Good — waning light, fish returning to shallow feeding patterns

In freshwater, the new moon and days around it are consistently cited as the most productive period. In saltwater, tidal movement driven by the full and new moons often produces the best bite.

Solunar tables

Solunar theory, developed by John Alden Knight in the 1930s, predicts daily feeding windows based on the moon’s position overhead or underfoot. The idea is that fish feed most actively during four windows each day: two major periods (about two hours each, when the moon is directly overhead or directly below) and two minor periods (about one hour each, at the moon’s rise and set). Independent research has found statistical support for increased feeding activity around these windows, though weather, temperature, and season can override them.

How to use moon phases practically

Moon phase is one factor, not the whole picture. A flat-calm new moon morning is ideal; a new moon morning after a cold front with howling wind is not. Use the moon to pick the best window within a week, then let weather and water conditions narrow it to the best day, and let the solunar times narrow it to the best hour. All three lined up together produce the most reliable bites.

Time your trip to sunrise and sunset too

The most reliable daily feeding windows are still tied to light — specifically the low-light periods around dawn and dusk. Our free sunrise and sunset tool gives the precise sun times and prime bite windows for your location and date, so you can layer moon phase on top of the daily light patterns for the highest-percentage fishing windows.

Related from Fishing Toolbox

• Why Dawn and Dusk Are the Best Times to Fish
• The Best Water Temperature for Every Gamefish

Hook size affects more than just whether a fish stays on the line. Too big and small fish can’t take it in; too small and a big fish throws it easily or the point can’t penetrate. Here’s how to match hook size to species, bait, and technique.

How hook sizing works

Hook sizes follow a numbering system that runs in two directions. Sizes 1 through 32 get smaller as the number gets bigger — a size 1 is much larger than a size 32. Once you pass size 1, the system reverses: sizes are labeled 1/0, 2/0, 3/0 (said “one aught,” “two aught”) and so on, getting larger as the number increases. A 4/0 hook is bigger than a 2/0, which is bigger than a size 1.

Hook size by species

Species	Common hook sizes
Bluegill, sunfish	Size 6–10
Crappie	Size 2–6
Yellow perch	Size 4–8
Trout (stream)	Size 10–16
Walleye	Size 2–2/0
Largemouth & smallmouth bass	Size 1–4/0
Channel catfish	Size 2/0–5/0
Northern pike, muskie	Size 4/0–10/0
Striped bass	Size 2/0–6/0

These are starting points. Hook size should also match the bait and the specific technique — not just the fish.

Match hook size to bait

The hook should be proportionate to the bait, not just the fish. A tiny hook on a big chunk of cut bait gets buried and won’t penetrate; a large hook on a small worm kills the bait’s action and looks unnatural. A good rule: the hook’s gap (the distance from the point to the shank) should be at least as wide as the thickest part of the bait. For live bait like minnows and worms, use the smallest hook that holds the bait securely without killing it immediately.

Hook styles matter as much as size

Within any size, hooks come in dozens of styles. Wide-gap hooks give more clearance for soft plastic lures. Circle hooks roll into the corner of the mouth rather than the throat, making them ideal for catch-and-release and live-bait fishing. Octopus hooks are short-shanked and good for threading worms or dough bait. Aberdeen hooks have a fine wire that’s easy to bend open to remove without killing small panfish. Pick the style for your specific method first, then size it to your target species.

When in doubt, go smaller

Experienced anglers almost always say the same thing: most beginners fish with hooks that are too big. A smaller hook penetrates more easily, is harder for the fish to feel and reject, and doesn’t require as powerful a hookset. If you’re missing fish or they’re short-striking, dropping down one hook size is often the fastest fix.

Related from Fishing Toolbox

• How to Tie the Palomar Knot
• How to Set Your Fishing Drag the Right Way

Putting line on a spinning reel the wrong way is one of the most common causes of annoying line twist — the coils of line that come off the spool and tangle at the worst possible moment. The fix is simple: load the line with the spool lying flat. Here’s how to do it right.

What you’ll need

• Spinning reel mounted on a rod
• New line on a spool
• A friend or a pencil through the line spool (optional, but helpful)

How to spool a spinning reel — step by step

• Step 1: Open the bail on the reel. Thread the tag end of the new line through the rod guides and tie it to the spool arbor with an arbor knot (two overhand knots work fine). Close the bail.
• Step 2: Lay the line spool flat on the floor — label side up. This is the critical step. Spinning reels lay line onto the spool in a specific direction, and laying the supply spool flat lets line come off with the correct twist orientation.
• Step 3: Hold the rod tip up, pinch the line lightly between your thumb and finger for tension, and turn the reel handle slowly. Watch the line as it feeds in — if you see loops forming, flip the supply spool over. The loops mean the line was coming off in the wrong direction.
• Step 4: Wind line onto the reel under light, steady tension. Fill the spool to within about 1/8 inch of the rim — underfilling causes poor casting distance; overfilling causes wind knots and tangles.
• Step 5: Once filled, cut the line from the supply spool, rig up your terminal tackle, and you’re ready to fish.

Why line twist happens

Spinning reels rotate the bail around a stationary spool. Every turn of the handle adds a small twist to the line. If you load the line in the wrong direction, these twists stack up — and after a few hundred casts you have a spool full of twisted, coiling line. The flat-spool method cancels out this twist as you load, so each turn of the handle takes off the same twist that going on the spool put in.

How much line to spool

For most spinning applications, 150–200 yards is more than enough. If your reel holds more than that, use monofilament backing on the arbor before adding your main line — cheap mono backing fills the spool without wasting expensive braid or fluorocarbon. Our free reel line capacity calculator can tell you exactly how much of any line will fit on your reel based on its rated capacity and the diameter of the new line.

Mono vs. braid on spinning reels

Monofilament is forgiving — it stretches, ties easily, and tolerates imperfect spooling. Braid is thinner for its strength, so you fit more on the spool, but it has no memory and can slip on an empty spool arbor. Always back braid with a short length of mono tied to the arbor first, then connect your braid with a uni knot. Fluorocarbon is a poor main line for spinning reels because its stiffness causes coiling and poor casting; use it as a leader tied to braid or mono instead.

Related from Fishing Toolbox

• Braid vs Mono: How Much Line Really Fits on Your Reel
• How to Set Your Fishing Drag the Right Way

The Palomar knot is one of the strongest and most reliable knots in fishing. It works with monofilament, fluorocarbon, and braid, holds close to 100% of the line’s rated strength when tied correctly, and takes about 30 seconds to learn. If you only know one fishing knot, make it this one.

How to tie the Palomar knot — step by step

• Step 1: Double about 6 inches of line to form a loop. Pass the loop through the eye of the hook.
• Step 2: Tie a simple overhand knot with the doubled line — leave the hook hanging loose at the bottom. Don’t tighten it yet.
• Step 3: Pass the loop over the hook completely, so the loop slides down and sits behind the hook’s eye.
• Step 4: Pull both the tag end and the standing line to tighten. Wet the knot first, then seat it firmly against the eye of the hook.
• Step 5: Trim the tag end close.

Why the Palomar is so strong

Most knots weaken line by creating a tight bend at one point — that pinch point is where the line breaks. The Palomar avoids this by wrapping doubled line through the eye, distributing the load across two strands instead of one. When tied and seated correctly, it regularly tests at 95–100% of the line’s rated strength in pull tests, which is hard to beat for a knot this simple.

Palomar on braid — one extra step

Braid is very slippery, and a standard Palomar can occasionally slip under hard load. When using braid, pass the loop through the hook eye twice before tying the overhand knot. This double-pass version is sometimes called the Double Palomar and eliminates the slippage issue without adding much complexity.

Common mistakes

• Not wetting the knot before tightening. Dry line generates heat when cinched and weakens the knot. Always wet it.
• Tying with too short a loop. If the loop is too short, you can’t pass it over the hook easily, and the knot won’t seat properly. Use at least 5–6 inches of doubled line.
• Passing the loop over only part of the hook. The loop must clear the entire hook — point, bend, and all — to seat correctly.

When to use a different knot

The Palomar is nearly universal, but it has two limitations. First, it doesn’t work on lures with two hooks (like treble-hook crankbaits) because passing the loop over two hooks at once is awkward. Second, when fishing with a leader, you’ll need a line-to-line knot (like an FG or double uni) to join the sections — the Palomar is a terminal knot for attaching line to a hook or lure.

Related from Fishing Toolbox

• How to Set Your Fishing Drag the Right Way
• Braid vs Mono: How Much Line Really Fits on Your Reel

Yellow perch are a favorite panfish across the Great Lakes and Midwest, and knowing what your catch weighs is half the fun of a good perch bite. This yellow perch length-to-weight chart gives quick weight estimates by length for fish in average condition.

Yellow perch length-to-weight chart

These figures use weight (lb) = length³ ÷ 2,000 (length in inches), which matches widely published yellow perch data — roughly half a pound at 10 inches and over a pound at 13 inches.

Length	Average weight
6″	0.11 lb
7″	0.17 lb
8″	0.26 lb
9″	0.36 lb
10″	0.50 lb
11″	0.67 lb
12″	0.86 lb
13″	1.10 lb
14″	1.37 lb

What counts as a “jumbo” perch?

Most perch caught are 6–10 inches and under a pound. The threshold for a “jumbo” varies by region, but most anglers use 10–12 inches as the marker — big enough for a worthwhile fillet — and a fish at the top of the table (13–14 inches, over a pound) is a genuine trophy that’s often 8+ years old. The all-tackle record is a 4 lb 3 oz perch caught in New Jersey in 1865 — the oldest-standing freshwater fish record in North America.

Put a number on your exact fish (worked example)

Weight (lb) = Length × Girth² ÷ 800

A 12-inch jumbo perch with an 8-inch girth comes out to 12 × 8 × 8 ÷ 800 = 0.96 lb, above the 0.86 lb chart average — a fat, deep-bodied fish. Measure both and use the free fish weight calculator; details in how to estimate a fish’s weight.

Why two perch of the same length weigh differently

Perch in highly productive lakes — abundant forage, uncrowded population — grow deep-bodied and can beat the chart by 10–15%. In heavily fished lakes where perch compete for limited food, they run lean. Pre-spawn and post-spawn fish bulk up; spawning fish slim down.

Where and when to find bigger yellow perch

Yellow perch hold in clear, cooler lakes, reservoirs, and slow rivers near vegetation with little current, and tolerate deeper water and lower oxygen than many panfish. They travel in schools, so where you catch one, more follow — stay put and keep working the spot. Lake Erie is the signature jumbo-perch fishery; pre-spawn spring produces the heaviest fish.

Yellow perch weight FAQ

How much does a 12-inch yellow perch weigh? About 0.85–1 pound — jumbo territory.

What’s a jumbo/trophy perch? 10–12 inches for a jumbo; 13-inch-plus is a true trophy.

Why do I catch perch in bunches? They’re schooling fish — find one and there are usually more nearby.

Related from Fishing Toolbox

• Black Crappie Length to Weight Chart
• Bluegill Length to Weight Chart