Why are members of the Family Acanthuridae commonly called "surgeonfish"?
Answer
Due to the sharp, scalpel-like spines near the tail fin base.
The common designation of 'surgeonfish' for all members of the Family Acanthuridae is directly attributable to a specific anatomical feature possessed by these fish. This family name references the existence of sharp, scalpel-like spines located near the caudal peduncle, or the base of the tail fin. These spines are formidable defensive weapons used against predators or in territorial disputes, hence the comparison to surgical instruments. Anyone interacting with these fish, especially aquarists, must be aware of these structures, as mishandling can result in painful injuries caused by these pronounced defensive adaptations.
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