some more of Cody and Marcus, along with symbiote Tetra, they're all in a polyam relationship

Marcus is a marine biologist who bonded with Tetra when he was working in a secret ocean lab, Cody is a navy seal sent to hunt down Tetra but ended up falling in love with both of them

Tetra's origins are unknown and is believe to have come from organic samples found at "Point Nemo," when merged with Marcus, he gives him the ability to swim very fast, breath underwater and survive extreme temperatures and sea pressure