Grass carp, silver carp, cuttlefish, catfish.

1. Grass carp is a streamlined fish with more meat and fewer spines. It is the first choice for boiled fish. In restaurants, most of them are grass carp.

2. Silver carp, also called fat-headed fish, has thick meat and is a relatively large fish. Compared with other fish, it has less spines and more meat.

3. Snakehead fish has thicker meat and fewer spines than grass carp and silver carp.

4. Catfish, like black fish, has more meat and fewer spines. It is also suitable for boiled fish.