150*70*70 fish tank, what kind of tropical fish is better?

Considering that novices don't recommend you to keep expensive mermaids, I suggest you do.

First of all, small fish

Lights are tired, Mary, traffic lights, red swords, beautiful women. But small fish may not live well.

Second, on a large scale.

Parrots, maps, arhats (only one is allowed) and silver dragons.

These are relatively easy to survive.