oh that sux, I was in the same boat as you the brevis I has was the last fish in my tank I thought would jump out and I lost 2 in the same day also when the did jump out. I realllyyy like my Ocellatus, those guy are really cool. so small but they are tuff. I love there look, but also they just seem to have more personality then my brevis. and they arent scared of anything, when i stick my hand in to clean if I get to close to there shells they start attacking my hand its the funniest thing. they are constantly moving sand around and building there shell castles. id def recommend getting a few , I had to split my shell areas (a good recommendation I got from Mike Dugan) into 3 or 4 different secluded groups of shells and it worked great for them.