Quarantining is a definite. If I were to do it, I would put it through a low-dose salt quarantine for about 3 weeks.
The reason I was asking, was for the nutritional value for the P. They (sunfish) are pond/lake dwellers so I don't know nutritional levels the fish itself is getting. When I catch them, they look healthy; showing radiant color and very active. But looks can be deceiving.