how long do neons live

the pet store said neons will get up to 2in
ive had mine fore a week and got the top part of tailfin cut off while being put into the tank will that regrow?
the guy that got my fish at the store didnt do a very good job getting the fish from tank to bag ,he let 2 jump out of the net and when he picked them back up he pinched them,will that hurt the life span
 
Yes Hebilly, it was a neon. A huge one. It's buddies were large too, but literaly half the size of this monster. Maybe I'll go back with my camera.
Come to think of it, I should buy this guy. He may eat my cardinals though.
 
2 of my 6 Neons are about 2inch long. Most of my Cardinals are that size too with a few just a little over 2inches.
 
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