Australian combtooth blenny

Geographical Origin and Habitat: This species is native to the southwestern Pacific, primarily found in the northern Great Barrier Reef in Australia. It inhabits shallow coastal coral reefs, reef flats, and slope areas at depths ranging from 1 to 15 meters, where it finds abundant shelter and rock cover.

Taxonomy and Morphology: Belongs to the Blenniidae family, genus Ecsenius. It is a small fish, reaching a maximum total length of about 6-7 cm. It features a blunt-headed profile with flat features, large mobile eyes set high on the head, and comb-like teeth adapted for scraping algae off rocks.

Social Behavior: A mostly solitary and territorial species, particularly toward conspecifics or other fish with similar feeding habits. It spends most of its time perched on rockwork or backing into small crevices, observing the surroundings with independent eye movements.

Coloration and Sexual Dimorphism: Displays a distinct coloration with a reddish-brown body dorsally and a creamy-white belly, accented by two horizontal rows of white spots or dashes along the sides. A dark brown band bordered by white runs through the eye. Sexual dimorphism is minimal.

Aquarium Setup: Requires a tank of at least 80-100 liters. The aquarium must be decorated with plenty of live rock containing small natural holes and crevices where the blenny can hide. The rockwork should offer flat surfaces exposed to light to encourage natural algae growth.

Diet and Feeding: Primarily herbivorous. It feeds by scraping filamentous algae and organic biofilm from rock surfaces. In captivity, supplement its diet with high-quality vegetable-based foods, spirulina, sheets of nori algae, and occasional small frozen foods like brine shrimp.

Water Quality: Standard marine water parameters are required: temperature 22 to 26 °C, pH 8.1-8.4, specific gravity 1.020-1.025. Moderate water movement and high oxygen levels are recommended to maintain fish health and prevent organic waste accumulation in the rockwork.

Compatibility and Cohabitation: An excellent reef-safe addition. It cohabits peacefully with most reef fish. However, it may show territorial aggression toward other Ecsenius blennies or species of similar shape and color. Avoid keeping more than one of the same species unless the tank is large.

Aquarium Breeding: Oviparous. The eggs are demersal and adhesive, deposited inside a crevice or empty shell where the male guards them until they hatch. Rearing the pelagic larvae in captivity is highly challenging due to the need for microscopic live starter cultures.

Risks and Diseases: Very hardy and disease-resistant. The main risk is starvation in newly established or overly sterile tanks lacking natural microalgae growth. It is also recommended to keep the aquarium covered to prevent the blenny from jumping out when startled.