I've had success with a size #22 barbless fly hook on 6X tippet, baited with PE mysis shrimp. I've caught everything from clowns to a flame angel to a 10" tang that way. But I've accidentally hooked the wrong fish a few times, too...
I've read that if you shine a bright light at your fish in the middle of the night they get stunned and are super easy to catch, might be less traumatic than a fishing pole
I usually sit there and send negative mental energy at the fish I want to remove. The fish then usually jumps out when I'm around to save them... or become a cracker if I'm not around. It doesn't work on my maroon clowns as they're made of sterner stuff but it did work on 4 other fish...