Those tropical fish are called the four great beasts.

Generally speaking, it's about Jinlong, Feifeng, Taihu and Pig-nosed Turtle.

But now, because the price of tiger tiger is ridiculously high, it is easy for a pig-nosed turtle to be bitten by a flying phoenix in indonesia tiger. Now it's a yellow-eared turtle, and it can eat fish dung, which is more reliable than a scavenger!

Arowana can be golden dragon, red dragon and silver dragon.