To be kosher, a fish must have fins and scales (Leviticus ch.11). So for example salmon has both and is kosher. Some eels, however, are not because while they have scales they have no fins. The sanitary reason is that fish without fins tend to be bottom dwellers and bottom dwellers, like lobsters, clams and oysters, tend to live in shallower waters and feed on anything they can find -- and in ancient times shallow waters was where human waste washed into the sea....Need I say more?
For further information, see the attached Related Link.
All kinds of sea food are allowed for Muslims to eat.
All kinds of fishes are acceptable to eat in Muslim dietary. All kinds of Crocodiles and frogs are not allowed.
No. For a type fish or seafood to be Kosher, it must have fins and scales.
Observant Jews do not eat crayfish.
Orthodox Jews are only allowed to eat kosher foods.
Fish that have fins and scales
The Torah permits us to eat fish that have fins and scales (Deuteronomy ch.14). No shellfish. See the attached Related link for a full list.
sharks eat all kinds of fish
They don't eat fish. They eat algae off of the coral reefs.
Yes.
Yes.
Jews who keep kosher don't eat fish wihout scales (Deuteronomy ch.14).