Midas Blenny: The Golden Fish for Your Reef Tank

| Updated: July 13, 2023
Midas blenny yellow and gold fish side profile swimming in a reef aquarium

Do you want to add some sparkle and shine to your saltwater aquarium? Do you love fish that are colorful, active, and friendly? Well, you should probably meet the Midas blenny then. This fish is a real gem that can make your tank look amazing and keep you entertained with its personality and charm. In this article, we’ll introduce you to the Midas blenny and show you how to take care of it in your saltwater aquarium. You’ll learn all about its scientific name, common names, size, color, diet, behavior, tank requirements, and more. Let’s dive in!

What is a Midas Blenny?

The Midas blenny is a type of marine fish belonging to the family Blenniidae, which includes about 400 species of small and elongated fishes mostly found in shallow tropical and subtropical waters. The scientific name of the Midas blenny is Ecsenius midas, which means “golden” in Latin. The common names of this fish are Midas blenny, gold blenny, lyretail blenny, or Persian blenny.

The Midas blenny comes from the Indo-Pacific region, where it can be found from the eastern coast of Africa to the Marquesan Islands. It lives in coral reefs and rocky outcrops, where it feeds on plankton and algae. It can grow up to 6 inches long and has a lifespan of about 5 years in captivity.

Species Overview

Scientific Name
Ecsenius midas
Common Names
Midas blenny, gold blenny, lyretail blenny, or Persian blenny.
Indo-Pacific region
Adult Size
6 inches
Life Expectancy
5 years
Minimum Tank Size
20-30 Gallons
Captive Breedable

What Does a Midas Blenny Look Like?

The Midas blenny is a stunning fish that has a deep golden-yellow body with blue accents around the eyes and fins. It has a long, slender shape with a pointed snout and a forked tail. It also has a large mouth that can open wide to suck in food particles from the water column. The color of the Midas blenny can vary depending on where it comes from, how it feels, and where it lives. Some specimens may have more vibrant colors than others, especially those from the Indian Ocean and the Red Sea. The Midas blenny can also change its color when it’s stressed or threatened, becoming darker or paler.

How to Care for a Midas Blenny?

The Midas blenny is a great choice for beginners and experts alike, as it’s hardy, adaptable, and easy to maintain. However, there are some things you need to consider before adding this fish to your tank. Here are some top care facts for the Midas blenny:

Tank size

The minimum tank size for a Midas blenny is 20-30 gallons, but larger tanks are preferred. The tank should have plenty of live rock and hiding places for the fish to feel secure and comfortable. The tank should also have moderate water flow and lighting to mimic its natural habitat.

Water conditions

The water parameters for a Midas blenny should be within these ranges: temperature 72-78°F, pH 8.1-8.4, salinity 1.020-1.025, ammonia 0 ppm, nitrite 0 ppm, nitrate <20 ppm. The water quality should be monitored regularly and maintained with partial water changes every two weeks or as needed.


The Midas blenny is an omnivore that needs both meaty and plant-based foods in its diet. It’ll readily accept a variety of prepared foods such as flakes, pellets, frozen foods, brine shrimp, mysis shrimp, chopped clams or mussels, and algae-based foods containing spirulina or other herbivorous ingredients. It should be fed two to three times a day in small amounts that it can consume within a few minutes.

Tank mates

The Midas blenny is generally peaceful and can get along with most other reef-safe fish of similar or larger size. However, it may show aggression towards other blennies or fish with similar shapes or colors. It’s best to keep only one Midas blenny per tank unless you have a very large tank with enough space and hiding spots for each fish. You can also keep some invertebrates such as shrimp, crabs, snails, or starfish with the Midas blenny, as they’ll help control algae growth and provide some natural food sources.


Breeding Midas blennies in captivity is not common or easy as they’re secretive and territorial when spawning. They usually mate at night and lay their eggs in crevices or holes in the live rock. The eggs are sticky and hatch after about 5 days. The fry are very small and require microscopic food such as rotifers or copepods for the first few weeks until they can eat larger foods.

Why Choose a Midas Blenny for Your Tank?

There are many reasons why you might want to add a Midas blenny to your tank. Here are some of the benefits of having this fish in your aquarium:

  • Beauty: The Midas blenny is a gorgeous fish that can brighten up any tank with its golden hue and blue highlights. It has a graceful and elegant appearance that can captivate any viewer. It can also change its color depending on its mood and surroundings, adding some variety and interest to your tank.
  • Activity: The Midas blenny is a very active and curious fish that loves to explore its environment and swim around the tank. It can often be seen darting in and out of the live rock, searching for food or hiding from predators. It can also be quite entertaining to watch as it opens its mouth wide to suck in food or water. It’s not a shy or timid fish and will usually come out to greet you when you approach the tank.
  • Personality: The Midas blenny is a fish with a lot of personality and charm. It can be very friendly and interactive with its owner and tank mates, often following them around or mimicking their movements. It can also be very expressive and show different emotions such as happiness, anger, fear, or excitement. It can even recognize its owner and respond to their voice or gestures.
  • Reef Compatibility: The Midas blenny is a reef-safe fish that won’t harm or bother any corals or other invertebrates in your tank. It’s also beneficial for the reef as it helps control algae growth by grazing on it and keeping it in check. It can also help aerate the substrate by stirring it up with its tail.

What are Some Midas Blenny Facts?

The Midas blenny is a fascinating fish with some unique and interesting facts. Here are some of them:

The Midas blenny gets its name from the mythical king Midas, who had the power to turn everything he touched into gold. Just like the king, the Midas blenny has a golden body that shines in the light. However, unlike the king, the Midas blenny does not suffer from the curse of greed and can enjoy its golden beauty without any regrets.

  • The Midas blenny is not a true blenny but rather a pseudochromid, a group of fish closely related to dottybacks. They have similar body shapes and behaviors but differ in some aspects, such as their teeth and dorsal fins.
  • The Midas blenny can produce sounds by grinding its teeth together. These sounds are used for communication, territorial defense, courtship, or warning. They can also hear sounds from other fish or predators and react accordingly.
  • The Midas blenny can mimic other fish species by changing its color, shape, or behavior. This is done for various reasons, such as camouflage, protection, predation, or social interaction. For example, it can imitate a wrasse by swimming with a side-to-side motion and displaying blue stripes on its body.
  • The Midas blenny is a very intelligent fish that can learn from its experiences and adapt to different situations. It can also recognize individual fish and remember their interactions with them. It can even solve problems such as finding food or escaping from danger.

How to Aquascape Your Tank for a Midas Blenny?

Aquascaping is the art of arranging the elements of your aquarium, such as rocks, plants, corals, and other decorations, to create a natural and aesthetically pleasing environment for your fish and other inhabitants. Aquascaping can enhance the beauty and health of your tank as well as the well-being and behavior of your fish.

If you want to aquascape your tank for a Midas blenny, here are some tips and ideas:

  • Use live rock as the main component of your aquascape. Live rock is rock that has been colonized by beneficial bacteria, algae, and other organisms that help filter the water and provide food and shelter for your fish. Live rock also gives your tank a realistic and natural look that mimics the reef habitat of the Midas blenny.
  • Arrange the live rock in a way that creates caves, crevices, ledges, overhangs, arches, or tunnels for the Midas blenny to hide in or explore. These structures will make the fish feel more secure and comfortable in your tank as well as provide some visual interest and depth to your aquascape.
  • Add some live sand to the bottom of your tank to create a soft substrate for the Midas blenny to rest on or dig in. Live sand is sand that contains beneficial bacteria, microorganisms, worms, crustaceans, or other creatures that help break down organic waste and provide food for your fish. Live sand also helps maintain the pH and alkalinity of your water as well as buffer any fluctuations.
  • Add corals or other invertebrates to your aquascape to create color and diversity in your tank. Some corals that are good for a Midas blenny tank are mushroom corals, zoanthids, leather corals, star polyps, or xenia corals.
  • Add plants or algae to your aquascape to create greenery and oxygen in your tank. Plants and algae are photosynthetic organisms that use light to produce food and oxygen. They can also help absorb excess nutrients and toxins from the water and provide shelter and food for your fish and other animals. Some plants or algae that are good for a Midas blenny tank are macroalgae, seagrasses, or mangroves.
  • Add accessories or decorations to your aquascape to create personality and flair for your tank. Accessories or decorations are items that you can use to enhance the appearance and theme of your tank. They can also provide some fun and enrichment for your fish and other animals. Some accessories or decorations that are good for a Midas blenny tank are shells, driftwood, ceramic pots, artificial plants, or ornaments.

Final Thoughts

The Midas blenny is a wonderful fish that can bring some joy and beauty to your saltwater aquarium. It’s a hardy, active, peaceful, and easy-to-care-for fish that can adapt to different environments and situations. It’s also a very attractive fish that has a golden-yellow body with blue accents and can change its color depending on its mood and surroundings. It’s also a very intelligent fish that can learn from its experiences and interact with its owner and tank mates.

We hope this article has helped you learn more about the Midas blenny and how to care for it in your saltwater aquarium. If you have any questions or comments, please feel free to leave them below. Thank you for reading!

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Kayla Stewart
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