Biliton Rockskipper

Blenniella bilitonensis

The Biliton Rockskipper, a member of the combtooth blennies, is a small fish typically found in the intertidal zones of the southwestern Pacific Ocean. Adults can grow up to 16 cm, but most are under 9 cm. They display a mottled pattern of tan and olive-brown, often with darker brown bars along their sides. Males are distinguishable by their broad vertical bars, while females exhibit H-shaped bars. The species can be identified by its unique dorsal and anal fin structures, and the presence of cirri on the head. This fish inhabits shallow coastal waters, often in tide-pools and rocky areas, where it feeds on algae scraped from rocks. It is known for its ability to jump and cling to rocks, an adaptation to its intertidal environment. The Biliton Rockskipper is oviparous, laying adhesive eggs that attach to substrates. The larvae are planktonic and found in the same shallow waters as adults. Divers may encounter this species in large congregations, especially in tide-pools. It is a harmless species, listed as Least Concern by the IUCN. While not of interest to fisheries, it plays a role in the ecosystem by grazing on algae and contributing to the food web.