6" Rabbitfish gone, no body?

[IPT]

Yesterday my 2 barred Rabbitfish didn't show up for the evening feeding. I don't even know how old he was, many years. This morning he's a no show as well and he has NEVER not been in sight. He is always tracking me and visible. He was acting fine the other day eating and same behavior though I did note over the last month or two he was looking thinner.

Its a bummer, and I am certain that he died, but now my concern is the tank. That's a lot of biomass and I don't see a body anywhere! Its a 120 gallon jam packed with SPS, LPS and Zoas. I can't really move rocks easily if at all to search for a body. I might try and move what I can but, the tank is stuffed to the gills (I dose over a gallon a day of Kalk and about 140ml of part A and B daily).

How bad do you think my parameters will swing? I'll be testing Po4 and N03 daily for a while. I know I have a healthy bristle worm population and some asternia starfish. My Pod population was decimated when I had white bugs a few months ago and doses interceptor.

It's so odd, being in this for 30 years I have lost some fish over time. It always amazes me how they just "disappear" without a trace.