My Rod's Onyx went through a weird brown phase with my Brown Magnifica.
They've been with that anemone since I got it. But for some reason around one year in with it, they lost the black and went brown...
One month with Ritteri before being a mated pair 04-06:
Brown phase while spawning, at 1.5 years with anemone in Sept 07:
Female in 09
Dec of last year, 2010
Yesterday....
Same anemone and clowns for the entire series of pics....diet has been pretty much the same the entire time. Uncooked shrimp pieces, uncooked scallop pieces, occassional mix of PE mysis, Hikari mysid, Rod's food, spirolina enriched brine shrimp....
The female is now pretty much solid black....
Sorry for blowing up your thread with pics of my critters but I wanted to show you that mine went through that too and then darkened back up.
One thing I just realized while typing this is that the anemone "sting" did not affect me the first year or two I had it, which happened to be the same window the clowns went through their weird brown phase. The tentacles were sticky and the feeding response was good, but it didnt burn me.
After that two year period, and currently, the anemone will burn me and leave a nasty welt for a couple of hours, to a few weeks depending on where I'm stung by it. Hands, couple of hours, inner arm while cleaning the tank, weeks.
I know that Carpets are notorious for being fish eaters and having a potent "Sting"/powerful nematocysts. It is also documented that clownfish in Carpet anemones go melanistic and it has been hypothesized that the stronger nematocysts cause the clowns to get darker.
Could it be that it took my H.magnifica about 2 years to get back to full health and develop the more powerful nematocysts that will burn me and caused the clowns to go melanistic again?
Nick