Hybrid Crocodile
Yai is the name of a hybrid crocodile who is a cross between a saltwater crocodile and a freshwater Siamese crocodile. This crossbreeding happened only because the two-parent crocodiles were kept together in a zoo- it would not naturally occur in the wild as the two types of crocodiles have different habitats.
The result of their union was a 20-foot long colossal animal weighing 1,134 kilos (2,500 pounds)- certainly not something you’d want to come across yourself!