If I were to name this fish, a "yellow fin white dot white stripe fish" 
would come to mind. However what is really called is a Whitespotted 
Surgeonfish. Surgeon because a scalpel-like structure (actually a caudal 
spine) is found near their tails which they use a both a defensive and 
offensive weapon by swiping their tail side by side, and fish because 
well, he's a fish! Soo, that's the 'tale' of the 'tail.'