Actually no. A prison gang activities outside on the streets is an extension or branch of the group. Prison gangs method of operation and background is starkly different than street gangs. Speaking of traditional prison gangs ( La Eme, BGF, AB, NF) they are more discipline, stricter, and mature ( average prison gang member is late 20-40). When they recruit it's selective and they blend on the streets. General prison gangs don't have colors, hand signs nor taggings. They have a tattoo symbol that means their official members. You can't drop your membership because it's lifelong.

Latinos/Hispanics & whites seem to have more prison based gangs than blacks. Black street gangs keep their affiliation in prison. BGF is the oldest active black prison gang. UBN is a prison gang but not in the traditional sense.