Parshas Shemini discusses the signs used to determine whether an animal is kosher or not. An animal that chews its cud and has split hooves is kosher. There are 24 species (some include sub-species) of birds specified in the Torah which are not kosher. All other birds are kosher. A fish that has fins and scales is kosher.
We made fish out of sandwich cookies and gummi hearts. (If you\’re too busy in the after-Pesach rush, just buy jelly fish)
שמיני יא:ט
Shemini 11:9