Lost my first fin ever yesterday while fighting a big bat ray in my tube. I can't believe I've gone over 15 years without losing one. I didn't even realize it was gone until I was out of the water (had my mind on other things). I suggest making leashes for your fins. I made some out of velcro watch bands and nylon string (what they use for the caps on dive tanks).

You can't catch tomorrow what you kill today - please practice catch and release.