Common name: Twocoat coralblenny

General information

The Dilemma Blenny, scientifically known as Ecsenius dilemma, is a charming and distinctive fish that adds personality to any marine aquarium. This species is part of the Blenniidae family and is recognized for its unique coloration, with the anterior part of its body being a pale yellow and the posterior part a deep blue or black. This two-tone coloration is where its alternative name, the Two-tone Blenny, originates.

Care

Dilemma Blennies are hardy and adaptable, making them suitable for both beginner and experienced aquarists. They thrive in well-established aquariums with plenty of live rock for grazing on microalgae and hiding. These blennies are known for their curious nature, often perching on rockwork to observe their surroundings. A varied diet that includes marine algae, vegetable matter, and meaty foods will keep them healthy and vibrant.

Reproduction

In the wild, Dilemma Blennies are oviparous, with males often establishing territories and courting females by performing elaborate displays. After spawning, the male guards the eggs until they hatch. In the aquarium, breeding is possible but challenging, requiring a separate breeding tank and careful monitoring of water conditions.

Habitat

Ecsenius dilemma is found in the Western Pacific, from Indonesia to the Solomon Islands. They prefer shallow, coral-rich environments and are often seen darting among the crevices and overhangs of the reef.