The Bicolor Blenny, scientifically named Ecsenius bicolor, is a popular fish in the marine aquarium hobby due to its unique coloration and engaging behavior. Here’s a detailed look at this species:
Appearance:
- The Bicolor Blenny has a distinct two-tone coloration, from which it derives its name. The anterior (front) half is a deep blue or bluish-gray, while the posterior (back) half is a bright orange-yellow.
- These blennies have a long, slender body and large eyes, which are typically perched atop short stalks.
- They usually reach a size of about 3 to 4 inches in length.
Natural Habitat:
- Bicolor Blennies are found in the Indo-Pacific region, from the Maldives to the Philippines, and northern Australia.
- They inhabit shallow coral reefs and are often seen perched in crevices, holes, or among coral rubble.
Aquarium Care:
- Tank Size: A tank of 30 gallons or more is suitable for one Bicolor Blenny.
- Diet: These blennies are omnivorous. In the aquarium, they’ll graze on algae, so they can help in controlling certain algae species. Their diet can be supplemented with high-quality sinking pellets, frozen foods, and marine algae.
- Tank Mates: Bicolor Blennies are generally peaceful but can be territorial with other blennies or similar-sized fish. They can be kept with a variety of reef-safe fish and invertebrates.
- Environment: Provide them with plenty of hiding spots using live rock. They enjoy darting into crevices and observing their surroundings from a safe perch.
- Behavior: Known for their curious and bold behavior, Bicolor Blennies often “perch” using their ventral fins and observe their surroundings. They can be quite entertaining to watch due to their quirky movements and mannerisms.
- Health: Ensure that water parameters are stable. Like all marine fish, they can be susceptible to common marine diseases, so a quarantine period for new specimens is always a good idea.
Things to Note:
- Bicolor Blennies have been known to nip at coral polyps, especially if they aren’t getting enough food, but they are generally considered reef-safe. Monitor their behavior if you have a reef setup.
- They have a unique way of moving around the aquarium, often “hopping” from rock to rock.
Conclusion: The Bicolor Blenny is a delightful addition to most saltwater aquariums, bringing both vibrant color and personality. Their engaging behavior and algae-eating habits make them a favorite among many marine aquarists. As always, do thorough research and ensure you can meet their care requirements before adding one to your tank.
