Baryonyx

Baryonyx was a fishing theropod found in the UK and the Iberic Peninsula. It had a big thumb claw to stab prey.

Iberomesornis's Idea
Baryonyx would have a pool filled with fish in the center of its exhibit, for fishing. Small birds should also be present, that would groom a resting Baryonyx like if it was a crocodile. Floor should be muddy and wet. and a scratching post for claws would be great enrichment.