Keepers at the centre in Ellesmere Port, Merseyside, they are even learning when to open their mouths for food.
They said the type of training had worked with mammals before but hardly ever with reptiles.
“They are very intelligent and started responding to their names in just a few days,” said Tom Cornwall, the aquarium’s manager.
In a bid to train them, the crocodiles, which are called Cuvier’s dwarf caiman, are given food as a prize if they react in the right way.
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