The term F1 LMB refers to a first generation cross-breed between a northern strain LMB and a florida strain LMB. Northerns are known for being more agressive and less wary of hooks and lines but their life span is shorther. Floridas are somewhat more selective in what they'll bite but reach much larger sizes because they live longer (I've heard differing opinions on whether or not they grow faster).
The F1's retain the advantages of both strains. I've also heard that there is evidence to sugest that the world record 22Lb 4oz LMB was a naturaly occuring F1.

-Scott


Take great care of it, or let someone else have it.