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.
Human Monster SagaEdit
Monster Association ArcEdit
The Mad Doctor Fish are seen swimming in the fish tank containing Evil Natural Water. 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.
|Mad Doctor Fish vs. Iaian||114||None||Loss|
Abilities and PowersEdit
Because their collective threat level is Tiger, it can be implied that the Mad Doctor Fish are not extremely powerful. However, they still act as an effective mean for Evil Natural Water to conduct long-ranged attack.
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.
- They are the only monsters so far live like parasites in the body of a monster.
|Upper Echelons||Orochi • Psykos • Gyoro Gyoro • Black Sperm • Evil Natural Water • Homeless Emperor • Fuhrer Ugly • Gums • Overgrown Rover • Nyan • Elder Centipede • Gouketsu|
|Dragon||Gale Wind • Hellfire Flame • Phoenix Man|
|Demon||Awakened Cockroach• Bug God • Devil Long Hair • Do-S • G5 • Hundred-Eyes Octopus • Pureblood • Rafflesidon • Royal Ripper • Senior Centipede • Face Ripper • Fist Fight Djinn • Free Hugger • Rhino Wrestler • The Three Crows • Showerhead • Super Mouse • Unihorn • The Great Food Tub • Vacuuma|
|Tiger||Destrochloridium • Electric Catfish Man • Mad Doctor Fish • Maiko Plasma • Marshall Gorilla • Sludge Jellyfish|
|Unknown||Eyesight • Gyoffrey • Goddess Glasses • Venus Mantrap • Junior Centipede • Haragiri • Rosie • Choze • Benpatsu • Hamukichi • Volten • Evil Eye • Gale • Hellfire • Evil Eggs • Sword Devil Executioner|