Fish like their insides to stay on the inside.

Instead of struggling to yank out a deep hook, try cutting the line. The hook may rust out fairly quickly.

Fish cannot breathe out of water.

Fish need water to breathe. Instead of removing them from the water for multiple photos, try leaving them in the water for a quick photo.

Fish don't like to be squeezed.

Fish aren't toys. Instead of squeezing them, try holding them gently and with two hands.

Fish are meant to be wet.

Fish like to be wet. Avoid laying them on dry surfaces such as rocks or grass.