Isonode

Isonode (磯野で) also known as the Three Tails (三尾 Mio) is one of the Prototype Tailed Beasts.

Appearence
Isonode is a jellyfish-like Insect with clear, dark blue mushroom-like top with Four Legs, Three shrimp-like tails and yellow eye-like sparkles.

Abilities
Isonode possesses an enormous amount of chakra and can perform the Tailed Beast Bomb. It also has the ability to create coral, and swim at very high speeds.

Background
Isonode was one of the Prototype Tailed Beasts to be created by Eren's Mother. At one point during the time, Isonode was sealed within Maylu, the Resident of the Land of Haro.