On the very bottom right corner ofThe Island map, the open sea leads into a small island full of trikes, pteranodos, stegos, Paras and Ankylo. In the water in the middle you will likely find an Itchy and when you start the tame they only seem to swim to the other side of that pond (a 10 second swim away) and never into the open sea. Just because the water leading into it is full of Megalos, so it might take a while to get the Itchy back safely.

More Ichthyosaurus Taming & KO Tips