New Zealand slender clingfish

The Slender clingfish(Gastrocyathus gracilis) is a clingfish of the family Gobiesocidae, the only species in the genus Gastrocyathus. This species grows to a length of 4.5 cm TL. Endemic to New Zealand, this species is apparently only found in beds of strap-fronded algae. Harpacticoid copepods comprise the main component of their diet.