I could be mistaken but...

[ansonluna]

I have an orange linka star that is constantly all over the tank. He moves around like it's nobodies business and I have never attempted to feed it, but it seems to be thriving. Well, I have those small starfish that are said to eat coraline alge or have mixed reviews about them being in the tank. Well my girlfriend loves these small starfish and calls them "baby stars," so we track their movement. I had been noticing recently that as soon as I spot one with all five feet fully grown...I would see it again a few days later missing feet. I just assumed that I was a different one until a few days ago. I was cleaning my glass and my orange linka was chillin' on a rock....I accidently knocked him over exposing his mouth and what did I find to my suprise...yes, you probably guessed it by now....a "baby starfish" in his mouth. Could I be wrong or does my linka commit canabilism on different species of stars? If I'm not wrong, and anyone has these small starfish and willing to give them away, I will gladly take them.

[Reef69]

If you see them one day with 7 legs and the other day with 3, its because they split constantly, they drop legs and another one is born, they are a pest. They usually just walk around eating algea off your glass or your sand, but, they also eat acro tissue, so i suggest if you ever see a few of these on any acros or corals, take them out. Everytime i clean my tank and i happen to see one, i take it out. Im always on the look out for any asterina starts on any of my corals. Its a possibility your linkia ate one. Asterinas are VERY slow, so your linkia must have just bumped into one and ate it..

[::pete::]

There are different species of the asterina stars and not all eat corals. I have had them in my tank for years and I have never lost a coral to them or have ever seen them on a coral.

[don-n-sa]

her is a good read on them....

http://reefkeeping.com/issues/2004-06/ac/feature/index.htm