Hmmm Fish are leaving me o_0

[pirateblackshp]

Hey y'all fist off I searched all over for this and cant find anything so hopefully yall can help.
I have a 50 gal tank with 2 clowns, Royal Gamma, Pearl Jawfish, Blue tang, Yellow Wrasse, Horseshoe crab, Hermits, cleaner shrimp, and some crazy snail that stays in the sand and then pops up out of the sand like the movie Tremors....(sorry I forgot the name). Anyways the tang and jawfish disappeared, then the gamma died...... So I had the water tested and its fine. and water levels are spot on and no fish are suicidal....so does anyone have any options. Or know what the issue might be? Thanks in advance

 

[jwill275]

I lost a sailfin tang about four months ago. Gone - vanished!! No trace- I suspect my blue hippo tang harassed it and perhaps made it vulnerable to the brittle starfish hiding in the rocks- I have a 125 with atleast a dozen of these brittle starfish.