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Species · Lookalikes

Sand PerchorRock Sea Bass

Two fish anglers mix up. Here is what separates them, and what each one’s rules are in your state.

Studio photograph of a Sand Perch (Diplectrum formosum), side view, on a white background
Sand PerchDiplectrum formosum
Studio photograph of a Rock Sea Bass (Centropristis philadelphica), side view, on a white background
Rock Sea BassCentropristis philadelphica

Rules for both fish from 4 state rulebooks, checked Sep 18, 2026. Every rule names its source and the day it was last checked; the official rulebook is the final word.

How to tell them apart

Sand Perch

Cigar-shaped little sea bass pinstriped in blue and orange, brightest on the cheeks.

Rock Sea Bass

Shallow cousin with a dark dorsal blotch and blue face lines.

Rock sea bass, next to sand perch: stockier, dark blotch mid-dorsal.

Side by side

Sand PerchRock Sea Bass
Scientific nameDiplectrum formosumCentropristis philadelphica
Also called——
WatersNearshoreNearshore
Heaviest state record0.59 lb · Texas (1993)0 lb 14.72 oz · Mississippi (1992)
On the tableSweet white meat despite the size.Good, small fillets.
Rules of its own in1 states4 states

Rules for

Every state, both fish

The two fish are regulated differently in 4 of 4 states with a rule for either. In North Carolina, sand perch is No size limit, No bag limit and rock sea bass is No size limit, No specific bag limit. Call the fish wrong and you keep a short one or throw back a legal one.

StateSand Perch: size · bag · seasonRock Sea Bass: size · bag · season
Florida (Atlantic)Not specifically regulated; the state’s default for unlisted species applies.No size limitNo specific bag limitOpen year-roundOpenFederal rule (South Atlantic federal waters)SAFMC / NOAA SERO 2026 · likely · checked
GeorgiaNot specifically regulated; the state’s default for unlisted species applies.No size limitNo specific bag limitOpen year-roundOpenFederal rule (South Atlantic federal waters)SAFMC / NOAA SERO 2026 · likely · checked
North CarolinaNo size limitNo bag limitOpen year-roundOpenNC DMF 2026 · checked No size limitNo specific bag limitOpen year-roundOpenFederal rule (South Atlantic federal waters)SAFMC / NOAA SERO 2026 · likely · checked
South CarolinaNot specifically regulated; the state’s default for unlisted species applies.No size limit20/day aggregate, max 10 of any one speciesOpen year-roundOpenSC DNR 2026 · likely · checked

In the app

Point the camera at the fish and Chum names it before you take the picture, sand perch or rock sea bass, with the right rules for the water you’re standing in. No signal needed.

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Questions anglers ask

How do you tell sand perch from rock sea bass?

Sand Perch: Cigar-shaped little sea bass pinstriped in blue and orange, brightest on the cheeks. Rock Sea Bass: Shallow cousin with a dark dorsal blotch and blue face lines. Rock sea bass, next to sand perch: stockier, dark blotch mid-dorsal.

Which gets bigger, sand perch or rock sea bass?

Sand Perch. The heaviest state record we hold is 0.59 lb in Texas; the heaviest rock sea bass record is 0 lb 14.72 oz in Mississippi.

Which is better to eat, sand perch or rock sea bass?

Sand Perch: Sweet white meat despite the size. Rock Sea Bass: Good, small fillets.

Do sand perch and rock sea bass have the same limits?

Not everywhere. They differ in 4 state rulebooks. North Carolina: sand perch No size limit, No bag limit, rock sea bass No size limit, No specific bag limit; Florida (Atlantic): sand perch no rule of its own, rock sea bass No size limit, No specific bag limit; Georgia: sand perch no rule of its own, rock sea bass No size limit, No specific bag limit; South Carolina: sand perch no rule of its own, rock sea bass No size limit, 20/day aggregate, max 10 of any one species.