Carol Greef was recruited to Chad's fleet over at OctoGen Logistics. She was initially rejected along with Amir Sharkahn for their fear of the ocean and lack of swimming ability, but after some oceanic conditioning, Carol not only got over her fear of the ocean, she became apart of it as well, turning her into the sea life protecting super hero, Madame Coral. 

It is unknown how she got her ocean derived super powers for now...