deepone

This is a very rough exploratory drawing of what a deepone could look like, the description is something like a mix between humans, fishes and frogs, they are intelligent and dangerous but not as agile on land as they are under water. They are practically immortal and can attain gigantic size if alive for long enough, but most die violently early on in their lives. See also HP Lovecraft's mythos and 'Escape from Innsmouth' if you want to find out more about these characters.