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By Bob Goemans
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Ecsenius

Ecsenius bimaculatus

Springer, 1971

Twinspot Blenny, Two-spot Blenny

Likely Reef Tank Suitable

Likely Fish-Only Tank Suitable

Range: Indo-West Pacific Ocean: Philippines and northwestern Borneo.

Size: 2 inches (4 cm)

Natural Environment: Inhabits shallow rocky reef crests and usually found at depths between 3 – 50 feet (1 – 15 m) where it feeds mostly on algae.

General Husbandry: Occasionally seen in the trade and usually having a pale brownish body with two short blackish bars on the mid-body.

Can be maintained in either fish-only or reef aquariums having rocky areas with caves and holes to hide and rest in when needing to do so, and if feasible, containing heavy growths of algae that it can dine on.

Tankmates must be peaceful, as even moderately aggressive tankmates will prevent this species from getting its share of the food when available.

Requires a diet high in vegetable matter, and if sufficient aquarium algae is not present, its diet must be supplemented with vegetable matter including frozen and dried foods containing ‘marine’ algae and especially Spirulina algae. It should be fed as often as necessary to maintain its health.

Taxonomy:

    Order: Perciformes

    Suborder: Blennioidei

    Family: Blenniidae

    Genus: Ecsenius

FYI: Known to nip fleshy corals and clams, which may make it use in some reef aquariums somewhat risky.

Unless there is a sufficient amount of greens this fish will slowly waste away.

One per aquarium.

A good jumper, so you may need a covered tank.

Experience Level: Beginner

Temperament: Peaceful

Diet: Herbivore

Coral Safe: With caution

Fish Safe: Yes

Invertebrate Safe: With caution

Acclimation Time: 30 minutes+

Aquarium Environment: Reef or fish-only aquarium

Tankmates: Peaceful

Minimum Tank Size: 30 gallons

Temperature Range: 72 - 82°F (22 – 27°C)

Specific Gravity: 1.020 - 1.026

pH: 8.0 - 8.5

 Ecsenius bimaculatus (Twinspot Blenny, Two-spot Blenny)
Photo © John Randall
Ecsenius bicolor Ecsenius collettei
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