Hawzah News Agency – Can we eat a fish that has died in water?
Answer: It is Haram to eat fish that has died in water, if the fish died in the fishing net then its permissible to eat.
If I am unsure whether a fish is from the type which has scales or not, is it permissible for me to consume it?
Answer: When there is a doubt of the type of fish, then it is not permissible.
Source: https://www.sistani.org/