This type of kaiju was created by the H.E.A.T government and was broken free to the ocean which caused oil spills and nearly escaped many times from the kaiju universe. 

Classification: Mutated Sea Anemone

Powers and Abilities: Superhuman physical characteristic, large size(Type 0 to 2), stealth mastery(tentacles), water absorption(By simply touching prey, Medusa is capable of absorbing the water from a victim body, or even water in general), underwater breathing(type 2), body control, resistance to fire manipulation and heat manipulation. 

Attack potency: At least Mountain level(Nearly killed Godzilla, her blows with tentacles can hurt godzilla

Speed: At least Subsonic travel speed with higher reactions

Lifting Strength: Class G(Scaling from Godzilla)

Striking Strength: At least Island Class

Durability: At least Island level(Survived blows from Godzilla)

Stamina: Extremely high

Range: Tens of meters by sheer size

Standard equipment: none notable

Intelligence: Animalistic

Weakness: Will automatically melt when being introduced to a heat source such as fire.