Trigger fish

Marine fish with regularly ossified skeleton. High, rhomboid or oval body fish, compressed laterally, covered by bony plates. Small mouth and armed with sharp teeth, behind which is a small gill orifice. The first dorsal fin consists of 3 hard spines: the first is rough in the anterior part, with a slit and smooth in the posterior, and the second has a bony protuberance; When the first one rises the rest also make it moved by the membrane that unites them, and the second spine is captured in the first, forming a rigid vertical structure that fits the fish in cracks or cavities. The second dorsal, high, has 27 or 28 soft spokes. Anal opposite the second dorsal, with 23-26 soft rays. Ventral reduced to 1 spine. Gray color, with bluish and brown transverse spots.