Bicolor Blenny, Ecsenius bicolor

Overview

The Bicolor Blenny (Ecsenius bicolor) is a vibrant and active marine fish that adds a splash of color and personality to any saltwater aquarium. Known for its distinctive two-tone coloration, this species features a striking contrast of dark blue to black on the front half of its body, transitioning to a bright yellow or orange on the back half. Native to the coral reefs of the Western Pacific, the Bicolor Blenny is a popular choice among reef aquarium enthusiasts for its unique appearance and beneficial algae-grazing habits.

Diet

In the wild, the Bicolor Blenny primarily feeds on algae, making it an excellent addition to reef aquariums where it helps control algae growth. In captivity, this species thrives on a varied diet that includes:

• Marine algae
• Spirulina-based flakes or pellets
• Mysis shrimp
• Brine shrimp
• High-quality prepared foods designed for herbivorous fish

It is essential to provide a balanced diet to ensure optimal health and vibrant coloration.

Care Requirements

Caring for the Bicolor Blenny is relatively straightforward, making it suitable for both beginner and experienced aquarists. Key care guidelines include:

• Aquarium Size: A minimum of 20 gallons is recommended to provide adequate space for swimming and grazing.
• Water Parameters: Maintain stable water conditions with a temperature of 72-78°F, pH of 8.1-8.4, and specific gravity of 1.020-1.025.
• Tank Setup: Include plenty of live rock for grazing and hiding spots, as this species enjoys darting in and out of crevices.
• Behavior: Bicolor Blennies are generally peaceful but may exhibit territorial behavior towards similar species. It is advisable to keep them with other non-aggressive tank mates.

Maximum Size and Lifespan

The Bicolor Blenny can reach a maximum size of approximately 4 inches (10 cm). With proper care, these fish can live for 3-5 years in captivity, although some individuals may live longer with optimal conditions.

Additional Information

• Compatibility: The Bicolor Blenny is reef-safe and typically coexists well with a variety of corals and invertebrates. However, caution should be taken when housing it with other blennies or similarly shaped fish to avoid territorial disputes.
• Breeding: While breeding Bicolor Blennies in captivity is challenging, it is not impossible. They are egg-layers, and successful breeding often requires a dedicated breeding setup.

The Bicolor Blenny (Ecsenius bicolor) is an excellent choice for marine aquarists seeking a colorful and beneficial addition to their reef tank. Its algae-grazing habits, combined with its striking appearance and ease of care, make it a standout species that can enhance the overall health and aesthetic appeal of your aquarium. By incorporating the Bicolor Blenny into your reef setup, you not only gain a visually appealing fish but also a natural algae controller that contributes to maintaining a balanced and healthy marine environment.