I keep seeing pictures of people literally grabbing their fish from aquarium, usually it is done just for pictures. How safe is that? Any actual damage to the fish?
Better to do it that way than scruffing them up with a net. Wet hands are softer. The problem is that nets were invented because it's too hard to catch 'em with your hands!
Depends on the fish in question. Usually a better idea to use hands or other means with "spiny" fish than a net. I learned that lesson the hard way with a synodontis catfish long ago!