Unsure if this is a meant behaviour, but today I tamed two ocelots and had to move them back to my base.

Upon moving across the ocean in a boat I heard sounds from the newly tamed cat indicating it was being hurt. Turning around I saw it was being attacked by a pod of dolphins.  Before being killed.

Second cat and the same behaviour was witnessed.... pack of dolphins and cat attacked each other killing the cat.

It seems that either the cat is seeing the dolphins as fish, and attacking them. Or the dolphins are seeing the cat as an enemy and attacking it. Either way I dont think this is the meant behaviour, as it means it is impossible to move cats across water in a boat