Midas Blenny care

Ecsenius midas · Saltwater · Beginner level care

A hardy, bright yellow blenny that hovers above the rocks.

Smallest tank30 gallons

Adult size5 inches

Temperature75 to 80°F

pH8.1 to 8.4

GroupFine on its own

TemperamentSemi aggressive

SwimsMiddle of the tank

Lives3 to 5 years

Watch for: It claims a hole and can chase similar shaped fish. Keep only one.

Feeding

Twice a day. A small pinch they finish in about 2 minutes. Marine pellets, frozen mysis, algae sheets.

Claims a territory and guards it.

Fish that pass every check with Midas Blenny in a 60 gallon tank: same water, overlapping temperature, nobody gets eaten and no bullies.

What size tank does a Midas Blenny need?

At least 30 gallons. Adults grow to about 5 inches, so plan for the adult size, not the size at the store.

What temperature does a Midas Blenny like?

75 to 80 degrees Fahrenheit, with a pH of about 8.1 to 8.4. A steady temperature matters more than hitting one exact number.

How many Midas Blenny should I keep together?

One is fine. If you keep more, keep one male, since males fight each other.

What do Midas Blenny eat?

Marine pellets, frozen mysis, algae sheets. Feed twice a day: a small pinch they finish in about 2 minutes.

Checked against these sources on 2026-11-10. When sources disagree we use the safer number.