Achilles Tang Fish - The Acanthuridae are the family of surgeonfishes, tangs, and unicornfishes. The family is composed of marine fish living in tropical seas, usually around coral reefs. The distinctive characteristic of the family is the scalpel-like spines, one or more on either side of the tail ("thorn tails"), which are dangerously sharp. The small mouths have a single row of teeth used for grazing on algae. - Wikipedia
