Description

About the Bicolor Blenny (Ecsenius bicolor)

The Bicolor Blenny is a charming and distinctive fish featuring a unique two-tone coloration with a brown to purple front half and bright yellow to orange rear half, separated by a clear division. This entertaining blenny brings personality and color to reef aquariums with their characteristic perching behavior and curious expressions. Their small size, peaceful nature, and reef-safe habits make them excellent additions to community tanks, while their algae-grazing helps control nuisance growth.

Care Requirements

• Tank Size: Minimum 75 litres (20 gallons), though larger tanks are better
• Diet: Omnivorous with herbivorous preference - requires marine algae, spirulina, nori sheets, and will accept meaty foods. Grazes on microalgae
• Water Parameters: Temperature 24-27°C, pH 8.1-8.4, salinity 1.023-1.025
• Feeding Frequency: 2-3 times daily, supplement with algae-based foods
• Experience Level: Beginner - hardy and adaptable

Tank Compatibility

Peaceful and completely reef-safe. Excellent community fish compatible with most peaceful species. May show territorial behavior toward other blennies or similar bottom-dwelling fish in smaller tanks. Best kept as single blenny unless tank is very large. Compatible with clownfish, gobies, tangs, and other peaceful fish. Completely safe with all corals and invertebrates. Helps control microalgae growth through constant grazing. Their entertaining perching behavior and curious personality make them delightful to observe.

Fun Facts

• Distinctive two-tone coloration makes them easily recognizable
• Often perch on rocks with endearing, curious expressions
• Can "hop" along rocks using their pelvic fins
• May establish a favorite perching spot they return to regularly
• Help control microalgae and film algae through grazing
• Can live 4-6 years in captivity
• May jump when startled - secure lid recommended

Special Care Tips

• Algae Availability: Ensure some natural algae growth or supplement with nori and algae-based foods
• Feeding: Offer varied diet including both algae and meaty foods. Use veggie clips for nori
• Secure Lid: Can jump, especially when startled - tight-fitting lid recommended
• Hiding Spots: Provide caves and crevices for retreat and sleeping
• Territory: May be territorial toward other blennies - one per tank unless very large
• Acclimation: Hardy but benefit from proper acclimation (30-45 minutes)
• Reef Safety: Completely safe with all corals and invertebrates
• Observation: Very entertaining to watch - often display curious, dog-like expressions

Please be aware that variations exist within species, so your item may not precisely resemble the provided image. The size range of individual specimens is approximate and may vary. Any extraordinary fish size will be explicitly specified.