Cling fishes

Scientific name : Gobiesocidae

Cling fishes are a large family of small fishes, comprising over 100 species, mostly living in temperate-warm seas. All are very small and not easy to see: to know where to look for them is needed.

Fish with elongate, cylindrical body, scaleless and covered with a thick mucus, toxic in some species. Ventral fins are joined in an adhaesive disk, a sort of a very powerful sucker.
Tropical species are normally encountered in reef environment (back reef, reef front, external reef), often in association with invertebrates like sea urchins or crinoids. When swimming, they move all the body in an undulating pattern. Eggs are benthic and guarded by the male.
Generically resembling other small size benthic fishes, but the shape, the movements and the posture with folded tail in the shape of a question mark are typical.