Bicolor Blenny

The Bicolor Blenny (Ecsenius bicolor), is a small, vibrant marine fish known for its distinctive two-toned coloration and engaging personality. Native to the Indo-Pacific region, including areas like Sri Lanka, Indonesia, and Fiji, this species is a popular choice among aquarists for its algae-eating habits and ease of care.

(REEF SAFE / BEGINNER)

Essential Information:

• Common Names: Bicolor Blenny, Two-colored Blenny
• Scientific Name: Ecsenius bicolor
• Family: Blenniidae
• Origin/Habitat: Inhabits coral reefs and rocky areas in the Indo-Pacific region, often found perching on rocks and crevices.
• Maximum Size: Up to 4 inches (10 cm) in length.
• Lifespan: Typically 2 to 4 years in captivity.
• Level of Difficulty: Beginner; suitable for novice aquarists due to its hardy nature and straightforward care requirements.

Appearance & Physical Traits:

• Coloration & Pattern: The front half of the body is a deep blue or brown, transitioning to a vibrant yellow-orange towards the tail.
• Body Shape & Structure: Elongated body with a blunt head and continuous dorsal fin; lacks scales and has smooth skin.

Habitat & Environmental Needs:

• Minimum Tank Size: 30 gallons (114 liters) to provide adequate space for swimming and territory.
• Water Temperature: 72°F to 78°F (22°C to 26°C).
• pH Level: 8.1 to 8.4.
• Specific Gravity: 1.020 to 1.025.
• Aquascape: Incorporate ample live rock with crevices and hiding spots; these fish enjoy perching and require territories to feel secure.

Diet & Feeding:

• Diet Type: Omnivorous, with a preference for algae.
• Preferred Foods: Feeds on algae growing on live rock; supplement with marine algae, spirulina, and high-quality herbivore pellets or flakes.
• Feeding Frequency: Offer food 2 to 3 times daily in small amounts.

Behavior & Compatibility:

• Temperament: Generally peaceful but may exhibit territorial behavior towards similar species or other blennies.
• Social Behavior: Best kept singly unless in a large aquarium; can coexist with a variety of other peaceful marine species.
• Tank Mate Compatibility: Compatible with most reef-safe fish and invertebrates; avoid housing with aggressive species or those that may outcompete them for food.
• Activity Level: Active and curious; often seen perching on rocks and observing their surroundings.

Care Considerations & Additional Notes:

• Ease of Care: Hardy and well-suited for beginners; thrives in well-maintained aquariums with stable water parameters.
• Special Requirements: Ensure a diet that includes algae to meet their nutritional needs; provide a tank with a secure lid as they may jump.
• Breeding Info: Breeding in captivity is uncommon and not well-documented.
• Additional Notes: Regular monitoring of water quality and diet will help prevent common health issues.