Judaism requires that fish have both fins and scales. Some typical kosher fishes include: tuna, salmon, cod, scrod, halibut, arctic char, flounder, etc. Some typical non-kosher fishes include: eel, shark, catfish, marlin, etc. See also the attached Related Link.
Additionally, any non-fish sea-creature is not kosher, such as: shrimp, lobster, langostine, sea cucumber, crayfish, mussels, clams, squid, octopus, etc.
no, it is because God's Torah forbids Jews to eat pork. Non-Jews are permitted to eat it.
Observant Jews do not eat crayfish.
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.
Fish that have fins and scales
sharks eat all kinds of fish
They don't eat fish. They eat algae off of the coral reefs.
bread, berries, grain, vegetables and meat. however Jews were not permitted to eat the meat of any creatures without hoofs or hoofs that split feet i.e pigs, birds bats, rodents. Jews were not permitted to eat any meat that had been cooked with blood or anymeat with blood still in it. they were not permitted to eat the meat of any creature that had been offered as a sacrifice. Jews also would not eat unleaven bread (bread cooked without yeast) on the sabbath day or on religious days of the year. fish was also a very common food.
Jews who keep kosher don't eat fish wihout scales (Deuteronomy ch.14).
yes they can
Yes.
angel fish
Goldfish. They are "feeder" fish for them.