Blue Tang

Photo: Sara K. · CC BY-NC

Blue tangs at Coki Beach form mixed-species grazing schools with ocean surgeonfish and doctorfish, cropping algae from reef surfaces in sweeping passes that keep carbonate substrate available for coral recruitment. The scalpel-like spine at the tail base is erected as a defensive weapon when the fish is handled or cornered, a reminder that even benign-looking reef fish carry effective deterrents. Their relentless grazing makes them functionally indispensable for reef resilience across the Caribbean.