I think I had the Ichthyosaur looking too dolphin-like. I started thinking it's unlikely that it could curve it's body downward like a dolphin, as the dolphin, being a mammal, has a horizontal tail fin, and an Ichthyosaur had a vertical tail fin like fish. So I redrew the bugger, trying to get more of a sideways action while still keeping some good leaping action. I don't know if it's any better, but I think it's more accurate. Comments welcome.