Based on your request, it seems you are looking for information about either a “Midas Blenny” (a popular aquarium fish) or a “Midas Cichlid” (a larger freshwater fish), both of which are commonly referred to with the “Midas” name, rather than “Midi”. 1. The Midas Blenny (Ecsenius midas)
This is a popular saltwater aquarium fish known for its bright color and personality.
Appearance: Bright yellow-orange, sometimes with a slightly darker head. They can change color to blend in with their surroundings or show, as noted on this page from a pet-related site.
Temperament: Very peaceful and suitable for reef tanks. They often perch on rocks, swimming like an eel, according to user experiences on this forum.
Care Level: Easy. They are recommended for beginners, with a recommended tank size of at least 30 gallons, as described in this article about Midas Blennies.
Diet: Omnivores, they eat a variety of foods and help clean algae off rocks, as mentioned in this article about Midas Blennies. 2. The Midas Cichlid (Amphilophus citrinellus)
This is a larger, aggressive freshwater fish originating from Central America, often kept by enthusiasts.
Appearance: They are large, thick, and known for developing a prominent “nuchal hump” on their head. They come in vibrant colors including orange, red, white (“creamsicle”), or striped/barred.
Temperament: Highly aggressive and intelligent. They need large tanks (at least 90 gallons) and are often kept alone or with other large, tough fish, according to an expert’s experience with Midas cichlids.
Care Level: Moderate to challenging due to their aggression and need for high-quality water, as noted on this profile of Midas cichlids. Are you perhaps referring to something else, such as:
Midges (tiny insects/larvae used in fly fishing as “Midge larvae,” according to this video)? A specific Midi-controller/fish-themed musical project?
If you can tell me a bit more, such as if you saw it in a fish tank or in a river, I can provide more specific details. Midas Cichlid: Amazing Fish