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FishbeginnerSaltwater

Midas Blenny

Ecsenius midas

AnimaliaChordataActinopterygiiBlenniidae

📍 Indo-Pacific, Red Sea, East Africa

Ask Finn

Brilliant golden-yellow with a flowing, eel-like body. Often mimics Lyretail Anthias in colour. Perches on rockwork and darts into crevices when startled — reef-safe and entertaining to watch.

Size5"
Min Tank30g
semi-aggressive
Zonebottom

Care Guide

Diet

Midas Blennies are omnivores that require a varied diet of small frozen foods and quality flake foods. Feed mysis shrimp, brine shrimp, and small copepods once daily, supplemented with high-quality marine flakes and occasional algae-based foods. They will also graze on natural algae growth and biofilm in the aquarium, making them excellent for reef maintenance.

Behavior

These blennies are semi-aggressive bottom-dwellers that spend most of their time perched on rockwork, darting quickly into crevices when startled. They are highly entertaining to observe and relatively peaceful with non-competing species, though they may chase smaller fish or become territorial with other blennies. Their eel-like body and brilliant golden coloration make them visually striking additions to any reef setup.

Breeding

Breeding Midas Blennies in captivity is extremely difficult and rarely achieved in home aquariums. They require very specific environmental conditions and pair bonding that are challenging to replicate. Most specimens in the hobby are wild-caught, and successful captive breeding is not documented in standard aquarium literature.

Common Diseases

Marine Ich (White Spot Disease)

Symptoms

White spots on body and fins, rapid breathing, flashing against rocks

Treatment

Raise temperature gradually to 28-29°C, maintain excellent water quality, consider copper-based treatments or hyposalinity in quarantine

Bacterial Infections

Symptoms

Torn fins, lesions on body, cloudy eyes, lethargy

Treatment

Improve water quality, perform regular water changes, use broad-spectrum antibiotics if severe; quarantine infected fish

Parasitic Infections

Symptoms

Excessive scratching, weight loss, visible parasites, clamped fins

Treatment

Quarantine and treat with appropriate antiparasitic medications; maintain pristine water conditions

Head and Lateral Line Erosion (HLLE)

Symptoms

Pitting or erosion on head and lateral line, loss of appetite

Treatment

Improve diet with vitamin-enriched foods, enhance water quality, ensure adequate nutrition with varied frozen foods

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Quick Facts

pH
8.1–8.4
diet
omnivore — zooplankton, mysis, algae
maxSize
5 inches
minTankSize
20 gallons
temperature
72–82°F (22–28°C)

Temperature

72–82°F

22–28°C

Stats

Community tips0
Kept by0 hobbyists