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Valenciennes in Cuvier and

Valenciennes (1837) erected the genus Trypauchen [from the Greek trypa (hole) and

auchen (neck)] for Gobius vagina. The function of the opercular pouch is not known, but

this structure is only found in the following genera of Amblyopinae: Amblyotrypauchen,

Ctenotrypauchen, Trypauchen, and Trypauchenichthys.

Trypauchen vagina is locally abundant in certain regions and is even used as a food

source (Rainboth, 1996), but it has been little studied.