Blacknosed butterflyfish (Johnrandallia nigrirostris) the yellow ones, have a feeding strategy by providing a "cleaning service" to other species by removing dead skin, parasites and infected tissue.
Yellowtail surgeonfish (Pironurus punctatus) are found in schools on shallow reefs, feeding diurnally and primarly on algae in rocky areas. The 3 bony spines sticking out of their tail allow for a sharp defense mechanism.
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