Greenbeak Parrotfish

This species lacks a large pale area on the head (extending from the throat to snout) that is present in S. coelestinus. S. trispinosus has roughly homogenously-colored scales on flanks unlike in S. coelestinus where flank scales have distinct dark margins. S. trispinosus also lack the irregular bright-blue blotches on nape and around the eye. Juveniles are similarly colored as the adults, but bear a yellowish area on nape, similar to subadults of S. coelestinus (Ref. 40827).

Oviparous, distinct pairing during breeding (Ref. 205).

Occurs in coral, algal and rocky reefs and on algal beds (Ref. 40827).