Bi-color Blenny

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The bi-color blenny, also known as the bicolor blenny or two-color blenny, is a small marine fish belonging to the Blenniidae family. Its scientific name is Ecsenius bicolor. This blenny is known for its vibrant coloration, which consists of a distinct black anterior (front) and a yellow posterior (rear) section, hence the name "bi-color."

Here are some key characteristics and information about the bi-color blenny:

Appearance: The bi-color blenny has an elongated body with a single continuous dorsal fin that runs along its back. It typically reaches a maximum length of around 3 inches (7.5 centimeters). The anterior part of its body is black, covering the head and the first half of the body, while the posterior part is bright yellow.

Behavior and Habitat: Bi-color blennies are generally peaceful and can be kept in reef aquariums. They are commonly found in the Indo-Pacific region, including areas like the Red Sea, Indonesia, and the Great Barrier Reef. In the wild, they inhabit shallow coral reefs and rocky areas with plenty of hiding spots, such as crevices and small caves. They are known to be excellent jumpers, so a secure aquarium lid is necessary to prevent escape.

Feeding: In the wild, bi-color blennies are omnivorous and feed on a variety of small invertebrates, algae, and plankton. In captivity, they can be fed a diet consisting of high-quality marine pellets, flakes, and frozen or live foods such as brine shrimp, mysis shrimp, and small worms. Providing a varied diet will help maintain their health and coloration.

Compatibility: Bi-color blennies are generally peaceful but can become territorial, especially towards other blennies or similar-looking fish. It is best to keep them in a tank with ample hiding places and a well-established rockwork structure. They can coexist with a variety of tankmates, including other peaceful fish, invertebrates, and some small crustaceans. However, caution should be exercised when keeping them with aggressive or larger fish that may view the blenny as food.

Overall, the bi-color blenny is a fascinating and visually appealing fish that can make a great addition to a marine aquarium, especially for reef enthusiasts. As with any fish, it's important to provide them with a suitable environment, proper diet, and appropriate tankmates to ensure their well-being.
  • Care levelEasy
  • Temperament: Peaceful
  • Diet: Omnivore
  • Reef Compatible: Yes
  • Family: Blenniidae
  • Minimum Tank Size: 30 gallons 
  • Size: 1.5 inches

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