I take a lot of selfies alone with my bass; first, net the fish in a really big net with a long handle. After removing the hook, put the bass back in the net & keep it in the water ‘til you’re set up. Prop the iPhone on a good spot (such as a boat seat), set it to ‘selfie’ mode, with a timer setting, usually 3 seconds. Hit the button, take the fish from the net, picture snaps & release the bass. If you use rubberized netting, it’s none the worse for wear, and you’ll have a good shot.