question; Is the eel-part seperate from the armor? IE can another kaiju (theoretically) yank the eel out of the armor as some sort of fatality (I'm talking in terms of the narrative you've given it as opposed to in-game)
The Main body is somehow formed of a Sentient Coral Reef - essentially creating 80% of the creature's body. Mutant Barnacles provide ventilation for the inhabitants inside the armored red shell. It's two arms end in the two inhabitants of the reef - a mutant Sea Urchin and mutant Sea Anemone - essentially forming what one would consider "hands". And its head and tail are formed by the reef's largest inhabitant - a gigantic mutant predatory Eel. So in summation - this thing is formed by four separate mutants...
...This...could be...the most interesting Kaiju ever designed.
that's just a type of coral. do an image search on "Brain coral", it's not that rare. it's a nice way to make something attack the thickest, toughest part of the armor instead of the soft tasty eel though.