Saapunut 26.2.26

Bicolor Blenny – Ecsenius bicolor

Common name: Bicolor Blenny

Scientific name: Ecsenius bicolor

Origin: Indo-Pacific

Adult size: Up to 10 cm

Temperament: Semi-aggressive / territorial

Diet: Omnivore (algae & small invertebrates)

Minimum tank size: 110 L+

Reef safe: Yes

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Overview

The Bicolor Blenny (Ecsenius bicolor) is a visually striking reef fish featuring a bold contrast of deep blue on the front half of its body and vibrant orange toward the rear. With its curious personality and constant perching behavior, it quickly becomes a character fish in reef aquariums.

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Habitat & Tank Requirements

Thrives in established aquariums with:

• Extensive live rock for grazing and hiding

• Moderate water flow

• Stable water parameters

Recommended parameters:

• Temperature: 22–26°C

• pH: 8.1–8.3

• Specific gravity: 1.020–1.025

Reliable filtration and regular partial water changes are essential for long-term health.

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Behavior & Compatibility

Naturally territorial, especially toward other blennies or similar-shaped fish. Best kept singly unless housed in a significantly larger system with ample rockwork.

Generally peaceful toward dissimilar tankmates and reef safe.

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Feeding

A natural forager that consumes:

• Microalgae

• Copepods and small crustaceans

Supplement with:

• High-quality marine pellets

• Spirulina-based foods

• Frozen mysis or brine shrimp

Providing algae-based foods helps support digestive health.

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Why Choose a Bicolor Blenny?

• Hardy and adaptable once established

• Natural algae grazer

• Engaging, perch-and-watch behavior

• Distinctive two-tone coloration

An excellent choice for reef aquarists seeking a hardy, personality-rich fish that contributes both visual appeal and practical algae control.