Acanthurus Tristis Tang (M)

Acanthurus tristis, commonly known as the black surgeonfish or the polka dot surgeonfish, is a species of fish in the family Acanthuridae.

It is characterized by its dark coloration with distinctive pale spots and is often found in coral reefs across the Indo-Pacific region.

This fish plays a vital role in its ecosystem, primarily by grazing on algae, which helps maintain the health of coral reefs.

Acanthurus tristis can reach lengths of up to 28 cm (about 12 inches) and is popular in the aquarium trade, though it requires a proper habitat and care.