To be specific I based it off the deep sea gulper eels, that doesn't really come through in either this one or the coloured one, for example, I imagine that the character would swim somewhat like an eel and have the same kind of flexibility. What I mean by swim like an eel is that where there arms and legs would meet either the body or other leg/tail they would secrete a substance that somewhat sticks them together then swim in that streamlined shape. Also following gulper eel stuff the can open their mouths super wide by having mouths that stretch/unfold outward.