Ecsenius caeruliventris, known commonly as the Bluebelly blenny in Indonesia

Indonesia

Indonesia , officially the Republic of Indonesia , is a country in Southeast Asia and Oceania. Indonesia is an archipelago comprising approximately 13,000 islands. It has 33 provinces with over 238 million people, and is the world's fourth most populous country. Indonesia is a republic, with an...

, 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 a tropical blenny found in the western Pacific ocean, specifically in Sulawesi

Sulawesi

Sulawesi is one of the four larger Sunda Islands of Indonesia and is situated between Borneo and the Maluku Islands. In Indonesia, only Sumatra, Borneo, and Papua are larger in territory, and only Java and Sumatra have larger Indonesian populations.- Etymology :The Portuguese were the first to...

, Indonesia. It was named by Victor Gruschka Springer and Gerald R. Allen in 2004. Male Ecsenius caeruliventris can reach a maximum length of 2.4 centimetres, while females can reach a maximum length of 2.37 centimetres; it is one of the smallest blennies in Ecsenius. The species name means "Sky-blue belly" from the Latin

Latin

Latin is an Italic language originally spoken in Latium and Ancient Rome. It, along with most European languages, is a descendant of the ancient Proto-Indo-European language. Although it is considered a dead language, a number of scholars and members of the Christian clergy speak it fluently, and...

 words caeruleus and ventris, referring to the blue abdomen on the species; the common name is derived from this. The species is most similar to its sister taxon E. shirleyae

Ecsenius shirleyae

Ecsenius shirleyae, known commonly as the Shirley's blenny in Indonesia, is a species of combtooth blenny in the genus Ecsenius. It is found in the western Pacific ocean, specifically in Indonesia. It was first named by Victor Gruschka Springer and Gerald R. Allen in 2004, and can reach a maximum...

and E. bandanus

Ecsenius bandanus

Ecsenius bandanus, known commonly as the Banda comb-tooth, Banda clown blenny, or the Banda combtooth-blenny, is a species of combtooth blenny found in coral reefs in the western Pacific ocean....

.

Ecsenius caeruliventris are oviparous, and guard their eggs. The blennies swim at a depth range of 3-5 metres.