I've had a bottlenose dolphin OC basically like this for many years, though I forget how many years I've had this particular version of her. She's one of my main dolphin OCs, so I make a lot of changes to her rather frequently... as time passes, the changes accumulate so much that she ends up becomes like a completely different character than she was a few yeas ago. Sometime soon I should probably make myself settle on some "facts" about her to just stick with (and the same for my other dolphin OCs) so I can actually write the overly ambitious story I've long been planning to write about her and my other dolphin OCs...