The zoo is now home to four baby crocodiles - new arrivals from a northern Queensland zoo.

Tasmania Zoo owner Dick Warren says the new crocs are all boys.

They are only 20 centimetres long and would take about four or five years to reach their adult size, he said.

“They’re still babies, they’re very slow growing.”

The crocs’ diet was small mice and mince.

Like most baby animals, the crocodiles had been incredibly popular with visitors to the Riverside zoo, Mr Warren said.

“We get them out and all the kids can have a little nurse,” he said.