Common name: Barnacle blenny

General information

The Barnacle Blenny, scientifically known as Acanthemblemaria macrospilus, is a small and fascinating marine fish that is well-suited for the nano or smaller reef aquarium. This species is known for its unique behavior of residing in abandoned barnacle shells or small crevices on the reef. With their mottled brown and white coloration, they blend seamlessly into their surroundings, making them a delight to spot for the observant aquarist.

Care

Barnacle Blennies are hardy fish that require minimal care, making them suitable for both novice and experienced aquarists. They thrive in well-established aquariums with plenty of live rock for hiding and grazing. Although they are generally peaceful, they can be territorial towards their own kind, so it's best to keep them singly or in a mated pair. A varied diet of small, meaty foods will keep them healthy and active.

Reproduction

In the wild, Acanthemblemaria macrospilus exhibits fascinating reproductive behavior. Males prepare and guard nesting sites, often in the cavities they inhabit, and entice females to lay eggs within. After spawning, the male diligently guards the eggs until they hatch. While breeding them in captivity is challenging, it is possible with a well-structured setup and close attention to water quality.

Habitat

Barnacle Blennies are typically found in the tropical waters of the Eastern Pacific, from the Gulf of California to Ecuador, including the Galapagos Islands. They prefer shallow reefs and are often seen peeking out of their chosen nooks, always on the lookout for food or potential threats.