A deceased one.
My snowflakes only because they bit me between my fingers and drew blood.
Candy hogfish was the devil
African Flameback Angel - Would not leave my Zebra Eel alone.
Hmm for me toss up between a neon wrasse that after about 4 yes decided any small fish it could eat it would and I didn't catch it until I literally saw him eating the side off a large sailfin..other biggest mistake was a Kleins butterfly for aptasia control. After about 3 months he had cleared half the aiptasia. He then decided he would rather have coral...any coral.. he did not discriminate.... I ended up having to pull about 600lb of rock to catch them and decided to pull a couple more and restock with some new choices. One of those was a "reef safe Lamarks angel". Turns out not so reef safe so about 6 months later I broke down the 600lbs of rock again to catch some fish. Recently my large male scotts fairy wrasse decided to harass everyone. I got lucky and thought he had died but he apparently Free Willy'd into my sump somehow. So he will be for sale soon... noticing my small powder blue is being a bully now... probably be easier for me to list my nice fish.....
Good idea on hand feeding the clowns. Never thought of that.