At a glance the quick version
Looks how to spot one
Long-bodied combtooth blenny with a lyre-shaped tail
A long blenny that swims with a wavy, eel-like motion. Most are deep golden orange with a blue shadow under the chin and blue-ringed eyes, though some are grey, greenish or yellow. It has a small black spot near the vent.123
Personality what they are like
Generally peaceful and a good reef fish, though it can bully small plankton-eaters, firefish and gobies, especially in smaller tanks.3
Daily activity how busy a day looks
Spends time both perching on rock and swimming in open water a few metres above the bottom.13
Grooming and care the hands-on bits
A larger tank with lots of rocks for perching helps keep it calm and reduces squabbles.3
Home where they are happiest
Minimum about 30 US gallons (114 L), reef safe. Saltwater at about 22 to 26 °C, pH 8.1 to 8.4, dKH 8 to 12, specific gravity 1.020 to 1.025. Wild fish live along clear coastal and outer reef walls with moderate current, at 2 to 40 m.31
Food basics what goes in the bowl
Plankton eater in the wild. In the aquarium it takes meaty foods such as chopped crustaceans, mysis and enriched brine shrimp, plus some frozen herbivore food.123
Company who they like around
In the wild it often joins schools of similar-coloured fish such as the lyretail anthias. Keep one per tank.12
The story where it all began
Walter Starck described the species in 1969. Its name refers to King Midas of Greek myth, whose touch turned things to gold, because of the fish's golden colour.12
Fun facts for the dinner table
- 1
Its name honours King Midas, whose touch turned things to gold.1
- 2
It mixes into schools of lyretail anthias and copies their colour and swimming style.1
- 3
It can switch colour quickly as it moves between the reef bottom and open water.1
- 4
Unlike most blennies, it feeds on plankton up in the water column.2
Recognised by the official bits
- IUCN Red List
- Least Concern (assessed 2009)1
The care rhythm a typical week and year
A typical home-care rhythm for a Midas Blenny. A starting point, not a vet's advice.
- FeedingSmall amounts once or twice a dayevery day
- Temperature checkevery day
- Salinity checkevery week
- Top-upTop up evaporation with fresh RO water, not salt waterevery day
- Water testevery week
- Water changeAbout 10 to 20% of the waterevery 2 weeks
- Glass cleanevery week
Owner questions the things everyone asks
How often should I feed my Midas Blenny?
Feed small amounts once or twice a day. Furry Diary's starting plan suggests daily feeding. Adjust portions based on your fish's appetite and the food label, and ask your vet if unsure.123 Pet Wiki plan
What does a Midas Blenny eat, and what should it never eat?
It eats meaty foods like chopped crustaceans, mysis and enriched brine shrimp, plus some frozen herbivore food. Avoid feeding it anything not listed; stick to these safe options and consult a vet for specifics.123
How much space does a Midas Blenny need?
A minimum of about 30 US gallons (114 L) is recommended. A larger tank with lots of rocks for perching helps keep it calm and reduces squabbles.31
What temperature, light or water does a Midas Blenny need?
Keep saltwater at 22 to 26 °C, pH 8.1 to 8.4, dKH 8 to 12, and specific gravity 1.020 to 1.025. It needs moderate current and is reef safe. Check temperature daily and salinity weekly per Furry Diary's plan.31 Pet Wiki plan
How often should I clean a Midas Blenny's home?
Furry Diary's starting plan suggests cleaning the glass weekly and doing a 10 to 20% water change every two weeks. Test water weekly and top up evaporation daily with fresh RO water. Pet Wiki plan
Can a Midas Blenny live with others?
It is generally peaceful and a good reef fish, but keep one per tank as it can bully small plankton-eaters, firefish and gobies, especially in smaller tanks. In the wild it sometimes schools with similar-colored fish.312
How long does a Midas Blenny live?
Lifespan varies; no specific number is given in the sources. For accurate information, ask a good breeder or an exotic-pet vet.
Can I handle a Midas Blenny?
Handling is not recommended as it can stress the fish. It is best to observe it perching on rocks and swimming gracefully in the water. Avoid touching it.31
Written from the sources on this page, a few checked guides (VCA, ASPCA, RSPCA) and Pet Wiki's own starting care plan. A friendly guide, not a vet's advice.
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Every fact on this page has a numbered source. Spotted an error? support@petwiki.app.
- FishBase: Ecsenius midas fishbase.seused for distribution, size, depth, habitat, mimicry, diet, IUCN, etymology, describer
- Wikipedia: Ecsenius midas en.wikipedia.orgused for other names, colour change, diet, name origin
- LiveAquaria: Midas Blenny liveaquaria.comused for care, tank size, water parameters, diet, temperament
Checked 2026-09-30. Text is written in our own words from these sources.