Mad Doctor Fish

Mad Doctor Fish (マッドドクターフィッシュ, Maddo Dokutā Fisshu) are Mysterious Beings and part of the Monster Association.

Appearance
The Mad Doctor Fish's appearances are based on red garras (also known as doctor fish), but they have larger jaws and sharper teeth that bear a resemblance to carnivorous piranhas. They also appear to possess an unusual six eyes.

Monster Association Arc
The Mad Doctor Fish are seen residing inside of Evil Natural Water, which is in turn inside of a fish tank. A monster breaks the tank holding Evil Natural Water, releasing it as well as the fishes, to attack Atomic Samurai's DIsciples They devour the monster that released them, and Evil Natural Water then launches them at Iaian, but he easily slices them up.

Abilities and Powers
Because their collective threat level is Tiger, it can be implied that the Mad Doctor Fish are not extremely powerful.

Physical Abilities
Powerful Bite: They have a strong bite, able to easily pierce the flesh of other Mysterious Beings. They are able to completely devour weaker and wounded opponents in seconds.

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