Bicolor Blenny; Male – Ecsenius bicolor

About this fish

Bicolor Blenny; Male – Ecsenius bicolor is a saltwater blenny from the genus Ecsenius, offered as a male in this shop’s listed pairing. In a reef or fish-only aquarium, this small, active fish is valued for its perching behavior on live rock and its herbivore-forward grazing style, helping you add movement and algae-eating utility to a community setup.

Features:

• **Blenny behavior:** Commonly perches on rockwork and spends time along the bottom, making it easy to observe.
• **Reef-compatible with caution:** Generally suitable for reef aquariums, but it’s known to nip at fleshy items (corals/clams), so it’s best kept in systems where you monitor feeding and tank interaction.
• **Herbivore diet:** Requires a diet high in vegetable matter; it will benefit from marine algae foods such as Spirulina if you don’t have enough grazing available.
• **Peaceful temperament:** Typically peaceful, but it may be shy around larger, pushy tankmates and some individuals can become territorial.
• **Needs structure:** Does best with caves/holes and rocky areas to hide, rest, and feel secure.
• **Tank fit matters:** A covered tank is recommended because it’s a good jumper.

Specifications:

• Scientific name: Ecsenius bicolor
• Common name: Bicolor Blenny
• Care level (general): Beginner / easy
• Temperament (general): Peaceful (may become territorial; can be shy around larger fish)
• Diet: Herbivore; high vegetable matter (algae-based foods, including marine algae/Spirulina if needed)
• Reef tank suitability: Likely suitable; “with caution” (known to nip fleshy corals and clams)
• Minimum tank size: 30 gallons
• Adult size: Up to 4 inches (11 cm)
• Temperature range: 72–82°F (22–27°C)
• pH range: 8.0–8.5
• Specific gravity: 1.020–1.026