It seems there is another water type kaiju that is home to the under waters and will attack any intruders including human vessel as well. This is also seen in of of godzilla fights and was easily defeated twice. 

Classification: Kaiju, giant lobster

Powers and abilities: superhuman physical characteristic, stealth mastery, large size(type 1), natural weaponry, underwater breathing(type 2), adapt swimmer, resistance to radiation manipulation.

Attack potency: Small Country level(Briefly fought showa godzilla)

Speed: Subsonic(Swifter than godzilla), Massively FTL attack, combat and reactive speed

Lifting strength: Class M

Striking strength: Small Country Class

Durability: Small Country level(Was in close proximity to godzilla atomic breath)

Stamina: High

Range: Dozen of meters due to sheer size

Standard equipment: Claws

Intelligence: Animalistic

Weakness: None notable