trig·ger·fish 
(trĭgər-fĭsh′)
(trĭgər-fĭsh′)n. pl. triggerfish or trig·ger·fish·es
Any of various brightly colored fishes of the family Balistidae of warm coastal waters, having a roundish body and an erectile spine on the anterior dorsal fin that locks upright when the fish is threatened.
triggerfishqueen triggerfish
Balistes vetula