Asian sheepshead wrasse

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20100216 acaworld02
Semicossyphus reticulatus Korochan


The Asian sheepshead wrasse (Semicossyphus reticulatus) is a species of marine fish in the family Labridae. It is native to the northwest Pacific Ocean, particularly around Japan, China, and Korea. This species is notable for its pronounced sexual dimorphism and the large, bulbous heads of mature males.

Description[edit | edit source]

The Asian sheepshead wrasse is one of the largest members of the wrasse family, capable of reaching lengths of up to 100 cm (39 inches) and weights of up to 14.7 kg (32 lbs). The species exhibits significant sexual dimorphism, with males developing a prominent hump on their heads as they mature. The coloration of these fish can vary, but they are generally grayish with a reticulated pattern of darker lines.

Habitat[edit | edit source]

This species is typically found in rocky reef environments and kelp forests at depths ranging from 10 to 50 meters. They are known to inhabit both temperate and subtropical waters.

Behavior[edit | edit source]

Asian sheepshead wrasses are solitary and territorial fish. They are known to be protogynous hermaphrodites, meaning individuals start life as females and can later change to males. This sex change is often associated with changes in social structure and size.

Diet[edit | edit source]

Their diet primarily consists of crustaceans, mollusks, and other invertebrates. They use their strong jaws to crush the shells of their prey.

Reproduction[edit | edit source]

Reproduction in Asian sheepshead wrasses involves complex mating behaviors. Males establish and defend territories that attract females for spawning. Fertilization is external, with eggs and sperm released into the water column.

Conservation Status[edit | edit source]

The International Union for Conservation of Nature (IUCN) lists the Asian sheepshead wrasse as a species of Least Concern (LC). However, they are subject to fishing pressures in some parts of their range, which could impact local populations.

Related Pages[edit | edit source]

Categories[edit | edit source]

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Contributors: Prab R. Tumpati, MD