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Pseudanthias tuka
Bicolor fairy basslets live together in a large group. They will work together to protect themselves. If a fish aggressively approaches them, all the basslets will mob the fish, attacking it from every angle. They rarely kill the attacker, but they do scare it off. (shedd) about 8 cm
Aqua Terra Zoo Vienna; in the wilde: Lives in the warm parts of the Pacific Ocean and the Red Sea, above the coral ledges, caves and crevices on steep outer reef slopes of patch reefs