Blue TangorOcean Surgeonfish
Two fish anglers mix up. Here is what separates them, and what each one’s rules are in your state.
How to tell them apart
Blue Tang
Oval, deep blue to purple with a yellow tail spine; juveniles bright yellow.
Blue tang, next to ocean surgeonfish: solid blue.
Ocean Surgeonfish
Gray-blue to brown oval with a blue-edged tail and a pale band at the tail base; sharp spine on the caudal peduncle.
Ocean surgeonfish, next to blue tang: gray-blue, blue-edged tail.
Side by side
| Blue Tang | Ocean Surgeonfish | |
|---|---|---|
| Scientific name | Acanthurus coeruleus | Acanthurus tractus |
| Also called | Blue surgeonfish | Surgeonfish |
| Waters | Nearshore | Nearshore |
| Heaviest state record | — | — |
| On the table | Rarely eaten — ciguatera risk. | Rarely eaten — ciguatera risk. |
| Rules of its own in | 2 states | 2 states |
Rules for
Every state, both fish
Where either fish has a rule, the two are regulated the same. The name still goes in the log and on the tally.
| State | Blue Tang: size · bag · season | Ocean Surgeonfish: size · bag · season |
|---|---|---|
| Florida (Atlantic) | 9" FL max (tangs and surgeonfish)5 per species within 20-organism marine life aggregateYear-roundOpenFWC 2026 · likely · checked | 9" FL max (tangs and surgeonfish)5 per species within 20-organism marine life aggregateYear-roundOpenFWC 2026 · likely · checked |
| Florida (Gulf) | 9" FL max (tangs and surgeonfish)5 per species within 20-organism marine life aggregateYear-roundOpenFWC 2026 · likely · checked | 9" FL max (tangs and surgeonfish)5 per species within 20-organism marine life aggregateYear-roundOpenFWC 2026 · likely · checked |
In the app
Point the camera at the fish and Chum names it before you take the picture, blue tang or ocean surgeonfish, with the right rules for the water you’re standing in. No signal needed.
Get the appQuestions anglers ask
How do you tell blue tang from ocean surgeonfish?
Blue Tang: Oval, deep blue to purple with a yellow tail spine; juveniles bright yellow. Ocean Surgeonfish: Gray-blue to brown oval with a blue-edged tail and a pale band at the tail base; sharp spine on the caudal peduncle. Ocean surgeonfish, next to blue tang: gray-blue, blue-edged tail. Blue tang, next to ocean surgeonfish: solid blue.
Which is better to eat, blue tang or ocean surgeonfish?
Blue Tang: Rarely eaten — ciguatera risk. Ocean Surgeonfish: Rarely eaten — ciguatera risk.
Do blue tang and ocean surgeonfish have the same limits?
Yes, in every state that regulates either one. The table on this page lists each rule with its source and check date.