So the story is... i had a 6" irridescent shark in 75 gallon tank for almost a year. then for some unknown reason one of my JD's started beating up on him really really really bad. so then i put the shark in my 55 gallon tank with less aggresive fish like soem silver dollars, a giant gourami, a leporinus fasciauts, a few parrot cichlids, and some clown loaches. everything was fine for a few weeks. then last week when i did my weekly water chance and gravel siphon i noticed a skeleot in there with a redish looking tail and thought nothing of it (thinking that it might have been just a fish from when i first cycled the tank). then the other day when i was looking at my 55 i saw another skeleton with a red tail and realized that it might be one of my clown loaches. i started out w/ 4 clown loaches and tonight when i went o feed them i only saw 1 loach. then tonight my girlfried called me and told me that my irridescent shark had the last loach in his mouth... so the one that has been murdering my clown loaches is the irridescent shark.... DO NOT MIX THESE TWO SPECIES!!!!!!!!