Yes many species. I would not tag a bluegil less than 6 inches or a bass less than 8 inches. That shoull give you some frame of refrence to go by.
Oops. JWHAP and I tagged a 5 inch BG for practice during our last trip.
For anyone on the fence about tagging guns they are very easy to use. I am planning on tagging any larger bass that I catch to keep track of growth. We keep our tagging gun and tags (thank you Nate and Greg Grimes) in our tackle bag. I forgot to tag the LMB that we caught last trip because, well just because I got too excited about catching the bass.