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BiologyAlmost nothing is known of the biology and ecology of the Asian sheepshead wrasse, other than that it feeds on shellfish and crustaceans. Additionally, spawning behaviour has been observed in large aquaria, in which the strongest male drove away all other males before rising rapidly to the surface with a single female, where spawning occurred (1). Wrasses, especially the larger species, generally live long lives, are slow to reach sexual maturation and produce millions of tiny eggs in reproduction (3). Many species, including the related California sheepshead wrasse (Semicossyphus pulcher), change sex from female to male several years after female maturation, a phenomenon known as sequential hermaphroditism, or protogyny (1) (3).