Go to herbivore island (The island) at the right bottom. Go to map if unsure. Look around and you should find some itchyosaurus. But be careful, in the water they look like sharks, don’t mistaken them as sharks they have a pointed snout. Like if you found it helpful! :)
I’m pretty sure they make compy noises. I was trying to tame one and I kept hearing a compy, like really close. But it confused me because compys shouldn’t be underwater but nope, it’s an ichthyosaurus.
(I don’t know if it’s a bug or something but it’s kinda funny)
Im on mobile and was doing the pursuit for this one didnt actually know what it looked like could only see mega piranha and ca-whatever then i saw this croc thing so i thought maybe its more friendly than it looks and it was a scaro and chased me onto the beach i then just started spearing it got it to half health died then came back to see a triceratops kill it and leave me the rewards