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Midas Blenny

By The Aquarium Calculators Editorial Team ·

Ecsenius midas

Complete Midas Blenny care guide covering omnivore diet requirements, peaceful temperament, minimum 30 Gallons tank setup, and compatible saltwater tankmates. Difficulty: Easy.

Midas Blenny

Quick Answer

Midas Blenny (Ecsenius midas) is a stunning, golden-yellow blenny that swims actively in the water column, unlike most blennies that perch on rocks.. It requires a minimum 30 Gallons aquarium with a pH of 8.1 - 8.4 and temperature range of 24-26°C. This omnivore occupies the middle zone and makes an excellent addition to community setups.

Intro

Midas Blenny (Ecsenius midas) is a stunning, golden-yellow blenny that swims actively in the water column, unlike most blennies that perch on rocks.

Setup

A 30-gallon or larger reef tank with live rock, open swimming areas, and moderate flow. Provide caves and crevices for hiding.

Feeding

Omnivorous; eats mysis shrimp, brine shrimp, spirulina flakes, and small pellets. Feed twice daily.

Compatibility

Peaceful. Keep singly. Good with most reef-safe fish. Avoid with aggressive or fin-nipping species.

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Tank Position
Middle
Water Temp
24-26°C
Adult Size
See profile
Water pH
8.1 - 8.4

Species Characteristics

Adult Size
Lifespan
Growth Rate
moderate
Tank Compatibility
Community compatible
Indoor Aquarium
Yes

Water Parameters

Water Temperature
Humidity
Water pH

Tank Lighting

Tank Lighting
Standard lighting
Light Hours
N/A
Intensity
moderate

Feeding & Diet

Diet Type
Diet: Omnivore
Feeding Schedule
N/A
Live Food Options
N/A

Continue Learning

Recommended Tools

Fish Compatibility Calculator fish compatibility

Health & Disease

Ich (White Spot Disease) common disease • all fish

Related Guides

Understanding pH in Aquariums water parameters • ph

Similar Species

Banggai Cardinalfish Care Guide: Tank Size & Diet semanticSimilarity Blue Green Chromis Care Guide: Reef Tank & Diet semanticSimilarity Coral Banded Shrimp Care Guide: Water Params & Breeding semanticSimilarity

Frequently Asked Questions

How many Midas Blennies should be kept together?
Keep only one per aquarium, even in tanks over 100 gallons (378 liters). Midas blennies (Ecsenius midas) display a beautiful golden color and a swimming profile that mimics anthias, but they are territorial with other blennies of similar shape. A single adult requires a minimum of 30 gallons (113 liters) with a footprint of 30x12 inches (75x30 cm) and ample live rock (1.5 lbs/gallon). Provide at least 5 crevices and empty barnacle shells where they can back in to hide. Avoid with other Ecsenius species.
What are the exact marine water parameters for Midas Blennies?
Target pH 8.1 - 8.4, specific gravity 1.023 - 1.025 (35-35.5 ppt), General Hardness 7 - 12 dGH, Carbonate Hardness 8 - 12 dKH, Total Dissolved Solids 32,000 - 35,000 ppm, and temperature 72°F - 78°F (22°C - 26°C). Provide a rocky layout with empty barnacle shells or holes. Maintain nitrates below 10 ppm with weekly 20% water changes. Use a protein skimmer and moderate water flow (10x turnover). Stable salinity is critical; fluctuations >0.002 cause stress. Live rock with crevices is mandatory.
What is the dietary and medication protocol for Midas Blennies?
They are omnivores that feed on plankton, requiring 50% protein, 15% fat, 35% marine algae. Feed frozen mysis shrimp, brine shrimp, marine flakes, and finely shredded macroalgae formulas twice daily. Supplement with nori sheets and spirulina pellets. They accept high-quality pellets. Medication alert: Tolerate copper (0.15 mg/L Cupramine) but sensitive to hyposalinity. Praziquantel is safe. Quarantine with chloroquine phosphate (15 mg/L) for 14 days. Avoid formalin.
How to breed Midas Blennies in captivity?
Breeding is rare. Condition a bonded pair in a 75+ gallon reef tank with abundant live rock for 4 weeks. They are substrate spawners; the male clears a crevice. Spawning occurs inside the crevice; female lays 500-1,000 adhesive eggs. Male guards and fans eggs for 5-7 days at 75°F (24°C). Eggs hatch; larvae are pelagic and require rotifers and phytoplankton for 30-40 days. Metamorphosis occurs at 0.5 inches (1.2 cm). Not recommended for hobbyists due to specialized larval care.

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