Common name: Mussel Blenny

General information

The Mussel Blenny, scientifically known as Parablennius sierraensis, is a small and fascinating fish species that can add a touch of personality to any reef or fish-only aquarium. They are known for their unique appearance, with a body that is elongated and adorned with various patterns and colors, typically brownish or greenish with darker spots or bands. This species is relatively hardy and can be a good choice for both novice and experienced aquarists.

Care

Mussel Blennies are adaptable and can thrive in a well-established aquarium with plenty of live rock for hiding and grazing. They are generally peaceful but can be territorial towards other blennies or similarly shaped fish. A varied diet that includes meaty foods and marine algae will help maintain their health and coloration. It's important to ensure a tight-fitting lid as they are known to be skilled jumpers.

Reproduction

In the wild, Mussel Blennies are oviparous, with males often guarding and aerating the eggs until they hatch. In the aquarium, breeding can occur but is less common. If conditions are right, the male will prepare a nesting site where the female can lay her eggs.

Habitat

Parablennius sierraensis is typically found in shallow, rocky coastal waters where it often lives in close association with mussel beds, hence its common name. They can be found at various depths, often in surge zones where water movement is strong. Their natural range extends along the Eastern Pacific, from the Gulf of California to Peru, including the Galapagos Islands.