Ummm... pretty much all fish have scales! Dolphins and whales don't but they're mammals, not fish!
While most fish do have scales, there are many that do not. The shorter list would be which fish do not have scales. Some examples of fish without scales are catfish, angler fish, and sharks. In order for a fish to be kosher, it must have fins and scales. If you search for a list of kosher fish, then all the kosher ones will have scales.
Yes.
No, although both electric eels and catfish are ray-finned fishes, electric eels are the only members of the genus Electrophorus. There are electric catfish, but they are not closely related to electric eels and their electric shock only reaches an intensity of 35o volts versus the electric eels' intensity of 6oo volts.
eels eat fish
yes they did eat eels. When they were lucky that was.
Catfish, eels, sharks.
People eat catfish.
EEls only eat flies if they are green eels, otherwise they ae very dangerous to eels and may kill the eel :(
Sand eels eat tiny pieces of mackerel
yes they eat.some of them
eels
There are certain breeds of dolphins that eat eels. Bottlenose dolphins for example tend to eat eels as part of their diet.
No, it is not recommended to eat catfish raw.