"The Pilot" wrote in message ...
Maybe that's what is happening. What do they eat anyway?

They are voracious predators engulfing micro fauna
inhabiting healthy sand bed in the ocean...

I got one to my tank and QUICKLY recognized that
I have missing micro-brittle-stars which where
not long time before occupying my sand bed in
massive quantities. It took him about 4-6 weeks
to exterminate all of them... I returned this sand
sifting star to the store and repopulated my deep
sand bed with new animals and now I have my beloved
microstars thriving again and dealing with detritus.
Just don't buy them, they will waste away sooner or later.