[2020] Pet crocodile is invisible or not spawned correctly

Hey @igglebock

Welcome to our community.
Since you mention this is happening in Single Player, could you try checking under the mesh with ghost mode activated to see if the crocodile has fallen under it?

We’re currently aware of some situations in which pets and thralls would fall under the mesh. Our team is investigating as a part of our ongoing plan to revamp the followers feature.
Apologies for the inconvenience and glad you found your crocopet.