Common Snook
Centropomus undecimalis · Centropomidae
Also known as: Linesider, Robalo, Sergeant fish
A summer spawner that aggregates in passes and river mouths on the new and full moon — which is exactly what makes it easy to overharvest, and why Florida closes the season through the spawn.
- Typical size
- 24–32 in, 5–12 lb
- Max size
- Fish over 40 in and 30 lb are exceptional.
- Water
- Brackish
- Best season
- Late spring through summer around the spawn; autumn as fish move back inside.
Identification
Unmistakable: a hard black lateral line running the full length of the body and into the tail, a sloping forehead and a protruding lower jaw. Bright silver flanks, yellowish fins on fish from clear coastal water.
Habitat & Range
Estuaries, mangrove shorelines, coastal rivers, passes, inlets and surf beaches. Highly temperature-sensitive and vulnerable to cold kills, which sets the northern limit of the range.
Florida and the Gulf of Mexico south through the Caribbean to Brazil. In Florida, abundant from roughly Tampa Bay and Cape Canaveral southward.
Diet & Feeding
Ambush predator. Pinfish, mullet, pilchards, shrimp and crabs, taken from current seams and around structure, largely at night and around tide changes.
Spawning & Reproduction
Spawns through the warm months, broadly April or May into September or October, aggregating at the mouths of coastal rivers and in the major passes and inlets. Spawning concentrates around the new and full moons. Snook are protandric — most begin life as males and larger fish are predominantly female, which is why the biggest fish in an aggregation are the ones a population can least afford to lose.
Spawning windowSource-verified
- Run begins
- May 1
- Peak
- Jul 1
- Ends
- Sep 30
FWC research puts spawning from around April or May through September or October, varying with climate and water temperature. Pre-spawn fish stage at passes, inlet mouths and beaches as water climbs into the high 70s in late spring. No precise spawning temperature threshold is published, so none is given here. Spawning aggregations form at the mouths of coastal rivers and in the major passes, concentrating on the new and full moons. Florida's summer harvest closures are timed to this aggregation.
Timing is modelled for a mid-latitude reference population — fish the thermometer, not the calendar. Based on 1 cited source.
How to Catch
Fish moving water. Snook sit on the down-current side of structure — bridge pilings, dock lights, mangrove points — and let the tide bring food to them, so present with the current rather than against it. Around the spawn they stack in the passes on new and full moons.
Best techniques
- Sight fishing the beaches
- Night fishing dock lights
- Fly fishing
- Live bait under bridges and in passes
Lures & baits
- Live pilchards
- Pinfish
- White bucktail jigs
- Swimbaits
- Baitfish flies
Best season: Late spring through summer around the spawn; autumn as fish move back inside.