Product Description
The Bicolour Blenny (Ecsenius bicolor) is a popular reef-safe fish admired for its unique two-tone colouration, featuring a rich blue-grey front half that transitions into a vibrant orange-yellow tail. At approximately 5cm, this juvenile is an ideal addition to reef and marine community aquariums.
Known for its playful personality, the Bicolour Blenny spends much of its day perched on rocks and corals, darting between hiding places and grazing on algae. Its entertaining behaviour and natural algae-control abilities make it a favourite among marine aquarists.
Care Guide
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Scientific Name: Ecsenius bicolor
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Common Name: Bicolour Blenny
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Size Supplied: Approx. 5cm
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Care Level: Easy
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Temperament: Peaceful to Semi-aggressive (towards similar blennies)
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Diet: Herbivore / Omnivore (microalgae, spirulina, algae wafers, frozen mysis shrimp, quality marine pellets)
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Reef Safe: Yes
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Minimum Tank Size: 100 litres
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Water Temperature: 24–27°C
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pH: 8.1–8.4
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Salinity: 1.023–1.026 SG
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Maximum Size: 10–11cm
Feeding
Feed a varied diet including marine algae, spirulina-based foods, quality marine pellets, and occasional frozen mysis shrimp or brine shrimp. While it grazes naturally on algae, supplemental feeding is essential for long-term health.
Aquarium Setup
Provide a mature aquarium with plenty of live rock, caves, and crevices for grazing and shelter. Stable water parameters and moderate water flow will help this species thrive.
Compatibility
Suitable with:
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Clownfish
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Gobies
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Firefish
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Tangs
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Wrasses
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Basslets
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Most peaceful reef fish
Avoid housing with:
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Other blennies or similar-shaped fish in smaller aquariums
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Aggressive dottybacks or large predatory fish
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Territorial fish that may compete for hiding places
The Bicolour Blenny is an excellent choice for reef aquariums, combining eye-catching colour, natural algae-grazing behaviour, and an entertaining personality that makes it a favourite for both beginner and experienced marine aquarists.
