The Triggerfish family is comprised of peculiar shaped fish with two dorsal fins. The first dorsal includes a large spine that these fish use to lock themselves into places where they sleep or hide. The Triggers are also well known for their blowing behavior that they use to move items around in home aquariums. They will also pick items up with their mouths and move them. This is likely instinctual behavior that has rolled over from their nesting preparation. These fish can be aggressive, especially when feeding.
Blue Line Trigger