Ecsenius isos is a species of combtooth blenny

Combtooth blenny

Combtooth blennies are blennioids; perciform marine fish of the family Blenniidae. They are the largest family of blennies, with approximately 371 species in 53 genera represented...

 in the genus Ecsenius

Ecsenius

Ecsenius is a large genus of fish in the Blenniidae family. It currently contains 53 described species.-Species:*Ecsenius aequalis, Fourline blenny*Ecsenius alleni, Allen's blenny*Ecsenius aroni, Aron's blenny...

. It is found in coral reef

Coral reef

Coral reefs are underwater structures made from calcium carbonate secreted by corals. Coral reefs are colonies of tiny living animals found in marine waters that contain few nutrients. Most coral reefs are built from stony corals, which in turn consist of polyps that cluster in groups. The polyps...

s in the western central Pacific ocean, around New Hebrides

New Hebrides

New Hebrides was the colonial name for an island group in the South Pacific that now forms the nation of Vanuatu. The New Hebrides were colonized by both the British and French in the 18th century shortly after Captain James Cook visited the islands...

 and New Caledonia

New Caledonia

New Caledonia is a special collectivity of France located in the southwest Pacific Ocean, east of Australia and about from Metropolitan France. The archipelago, part of the Melanesia subregion, includes the main island of Grande Terre, the Loyalty Islands, the Belep archipelago, the Isle of...

. It was named by Victor Gruschka Springer and James F. McKinney in 1976, and can reach a maximum length of 3.2 centimetres. Blennies in this species primarily feed off of plants, including benthic algae

Algae

Algae are a large and diverse group of simple, typically autotrophic organisms, ranging from unicellular to multicellular forms, such as the giant kelps that grow to 65 meters in length. They are photosynthetic like plants, and "simple" because their tissues are not organized into the many...

and weeds. The specific name isos refers to the dark spots beneath the blennies' heads.