Quote:
Originally Posted by SeaHorse_Fanatic
Those are probably Asterina starfish. ie. harmless hitchhikers. They are in most reef tanks. I have dozens if not hundreds.
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Quote:
Originally Posted by FishyFishy!
This is what Asterina's look like. Harmless in small numbers. Tonnes of tanks have them.

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Not harmless. I let them outa control once. Had 1000s. Killed all my zoos.