##Catfish are a diverse group of ray-finned fish.
Catfish have one of the greatest ranges in size within a single order of bony fish. Many catfish have a maximum length of under 12 cm.
###Dangers to humans While the vast majority of catfish are harmless to humans, a few species are known to present some risk. Many catfish species have “stings” (actually non-venomous in most cases) embedded behind their fins; thus precautions must be taken when handling them.