Kashrut
Among the numerous laws that form "kashrut" are prohibitions on the consumption of certain animals (such as pork and shellfish), mixtures of meat and milk, and the commandment to slaughter mammals and birds according to a process known as "shechita". There are also laws regarding agricultural produce that might impact the suitability of food for consumption.
Panfish
The term panfish or pan-fish has been used to refer to a wide range of edible freshwater and saltwater fish species that are small enough to cook in a small pan. In "American Food and Game Fishes. A Popular Account of All The Species Found In America North Of The Equator, With Keys For Ready Identification, Life Histories And Methods of Capture" – Jordan and Evermann (1908) they identify all the following as "panfish" in some form or another: Yellow Perch, Candlefish, Balaos, Sand Launces, Rock Bass, Bullheads, Minnows, Rocky Mountain Whitefish, Sand Rollers, Crappie, Yellow Bass, White Bass, Croaker and of course most of the common small sunfishes such as bluegill and redear sunfish.