They are close relatives, but they belong to different families instead of the same fish. As far as the living environment is concerned, stingrays can survive in fresh water, but devil rays can't. It can only live in tropical or subtropical waters. Squid usually lives in the deep ocean and rarely swims to shallow water.

Stingrays belong to deep-sea fish, which are generally very large and can grow to 70 or 80 kilograms. Devil fish is also called manta rays. Compared with stingrays, devil fish is much smaller, usually about seven or eight pounds.