with rimless tanks becoming more and more popular the suicide fish issue seems to like it is more commonly discussed. i have seen lots of people give out tons of advice like this fish will jump or that fish is safe. It is often the same rational that is repeated at the LFS.
the key to keeping fish in the tank is providing them a safe and comfortable environment. my 6-line wrasse is at risk of being a jumper so i added him to my rimless tank first. he was able to find a couple of safe hiding places and claim his territory. i then added my kole tang, powder brown tang, two blue chromis, and my two clowns. all was well for a while but eventually my female ocellaris clown yes the big one jumped. i was mad. i had been watching the wrasse as a proposed "will jump" fish and the dang "wont jump" fish jumped.
i then added a harem of lyrtail anthias yes they are all "will jump" fish there have been some territory disputes between the wrasse and lyrtails but with 6 lyrtails to chase it never amounts to much. i later also purchased an ich magnet "hippo tang" and traded for a little clown. well all was going well when i had another jumping incident. the hippo tang jumped! weird tangs dont jump. i found him on the ground white and hard, i took a chance and put him back in the tank and he swam right into a rock. i was thinking great now he will die in there and i will have to dig him out. well the next morning all was well and my stupid hippo tang was trying to keep the lyertails form schooling as usual. i havent had any problems since then. (knock on wood)
point is even fish that will jump, don't and fish that wont, do. but if you are able to keep your fish happy enough there wont be a reason for any of them to jump. it helps to have a actinic only lighting phase of your light cycle because going form black to light is startling and has been attributed to jumping well at least thats what my LFS said....