Gharials

Gharials are a type of critically endangered crocodilian, however what is unique about them is they don't attack humans as they only eat fish, they would be a great addition to the swamp because let's be honest, the swamp needs a lot more life. And despite such cool animals, they are largely unheard of, and Minecraft is the perfect game to teach people about them. My idea for them is a large for the most part passive mob that is only hostile to fish, tadpoles, and frogs. They would lay special eggs similar to turtles and the only time they would attack you is if you got to close to their eggs, they would be bred with tropical fish and upon death wouldn't drop anything. Just like real life gharials they would have a unique feature where they carry their babies on their snout (they could carry up to around 4 or 5) and like foxes would be able to hold items, specifically fish in their mouths and would be able to consume said held fish. And that's it.