Blue Line Fuscus Triggerfish (Pseudobalistes fuscus)

Blue Line Triggerfish treat their tank like a construction site, excavating pits in the sand bed and shoving rockwork around to suit their taste, usually overnight while you're asleep. The fine blue tracery across an olive-brown body is easy to overlook until it catches the light, but the personality underneath is anything but subtle — smart, food-driven, and quick to recognize the hand that feeds it. Budget rock that can take a rearrange and a lid that won't budge.

Care level: Moderate · Temperament: Aggressive · Max size: ~12" · Min tank: 125+ gal · Diet: Carnivore, meaty foods