Quote Originally Posted by Puhlo View Post
I am not sure what I am doing wrong. I have caught 15 Ichthyosaur and got one message on the shadows forming and then nothing else. I did not see it point me to a direction. What should I have done? That was over 30 minutes ago.
Is it possible that you've deactivated Truth of the Ocean at some point while spearfishing? It needs to be on constantly if you want the shadows to keep forming. Otherwise it should work when you catch Ichtyosauruses.

Also the fishing spot that it spawns glows visibly only on the minimap.