What kind of starfishes are these?

[Maridia]

I have had these guys for a couple years. They came as hitchhikers. Not sure what kind they are or how big they'll get. Anyone know?


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[Maridia]

Oops, put the same pic twice, meant to have this one.


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[Gregcoyote]

Asterina starfish

http://reefkeeping.com/joomla/index.php/current-issue/article/45-reefkeeping-101-


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[JonathanG]

They aren't an issue unless they get crazy, at one point I had about 100 in my 150. I had some that were eating zoa polyps on frags I had, they never went after the colonies but they would hit my frags pretty good. I got a single harlequin shrimp and he cleared them up in about 2 months. I still have a population of them in my sump so I pull 3 or 4 a day out and throw them in the display.


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[Maridia]

Thank you all. I always wondered what they were and thought they might get bigger. I'll try to not let them plague the tank as I do have a coral. Thanks again.

 

[mr_X]

They don't always eat coral. It's just something that happens occasionally. They are very easy to remove if you have trouble with them.