Bicolor Blenny

• ExerciseModerate

  An active swimmer that appreciates open swimming space.

• GroomingRoutine tank care

  Weekly partial water changes keep them in top shape.

• Living spaceNano-tank friendly

  Happy in a small, stable, well-filtered tank.

• Owner experienceSome experience helps

  A little know-how makes life smoother.

• Commitment4–6 years

  Plan for a long, loving relationship.

Health to watch: Ich (white spot) · Fin rot · Parasites

The Bicolor Blenny (Ecsenius bicolor) is an Indo-Pacific reef fish reaching about 10 cm, its front half dark blue-grey and rear half bright orange. It spends much of its time perched on rocks or peering from a favorite hole, grazing on algae and darting out to investigate its surroundings. Provide a 115-litre (30-gallon) or larger reef tank with abundant rockwork and small crevices, at 24-26C, salinity 1.024-1.026, pH 8.1-8.4. It grazes film algae but should be offered dried nori, spirulina foods, and mysis to keep it well fed. It is reef-safe and generally peaceful, though it may nip at other blennies or, occasionally, at coral polyps or clam mantles. Keep just one per tank.

• How active is a Bicolor Blenny?

  Moderate. An active swimmer that appreciates open swimming space.

• How much maintenance does a Bicolor Blenny need?

  Routine tank care. Weekly partial water changes keep them in top shape.

• What tank size does a Bicolor Blenny need?

  Nano-tank friendly. Happy in a small, stable, well-filtered tank.

• Is a Bicolor Blenny a good fit for first-time owners?

  Some experience helps. A little know-how makes life smoother.

• How long do Bicolor Blenny live?

  4–6 years. Plan for a long, loving relationship.

• What health issues affect the Bicolor Blenny?

  Keep an eye out for Ich (white spot), Fin rot, Parasites. These are worth raising with your vet, along with any screening they recommend.

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