Bellapiscis medius

Bellapiscis medius, the twister, is a triplefin fish of the family Tripterygiidae, commonly found around the coast of New Zealand.^[2] Its length is between 5 and 10 cm.^[3]

Bellapiscis medius
Conservation status
Least Concern  (IUCN 3.1)[1]
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	Actinopterygii
Order:	Blenniiformes
Family:	Tripterygiidae
Genus:	Bellapiscis
Species:	B. medius
Binomial name
Bellapiscis medius (Günther, 1861)
Synonyms
Tripterygium medium Günther, 1861 Enneapterygius medium (Günther, 1861) Helcogramma medium (Günther, 1861)

Habitat

This species is the only triplefin that as an adult lives in intertidal zone habitat.^[4] It can be observed in tidal pools and has adapted to survive the changes in temperature, oxygen saturation and levels of water acidity that accompany living in that habitat.^[4] The abundance of this fish in tidal pools decreases during the winter months.^[5]

Prey

B. medius feeds on small crustaceans including barnacles, molluscs including snails, and amphipods.^[4]