axolotls should pick up fish

Axolotls kill fish but they don't really do anything with the fish they killed, so axolotls should pick fish in their mouths and eat it like foxes. If axolotl was tamed, it would bring the fish to owner, but if owner isn't nearby enough, it would eat the fish just like a wild one. I want this to be done because

1. I hate when there's tons of fish just floating around

2. axolotls should have a reason to hunt fish

Also, axolotls could heal a bit when they eat fish.