But gained one! During a dive off Key Largo on a very rough day, I was at about 30' when a blue Mares Plana Avanti size large floated by me. I grabbed it thinking someone on our boat must have lost it. Upon surfacing and returning to the boat no one claimed it. Since it is identical to my own fins (except mine are green) I started wearing one blue and one green fin. Everyone I dive with says its always easy to spot me on a dive! When asked about the two different color fins I always say that I have another pair of the same at home.
By the way, I was diving with a couple of new divers when they mentioned that the fins they bought off e-bay were two left fins. They hadn't noticed any difference when wearing them on either foot. I asked why they thought these fins were lefts, "because they have L's on the bottom"! When I suggested that the "L's" might stand for "Large" they nearly melted!
Then there was the guy who was diving with "his foot sizers" in the fins. What foot sizers I asked? He showed me the inserts that come with the fins to hold the pocket shape during shipping and storgage! yes, there are some interesting fin stories out there.