Star fish surprise

[Dearth]

I've known for months that I had a brittle star(tentatively identified as a fancy tiger striped serpent sea star) in my tank that is about 6 inches from arm tip to arm tip today while doing my weekly water change I discovered that I have 2 possibly 3 more brittle stars in my tank.

So far they haven't caused any issues to my fish/coral/CuC but I am concerned as my tank is only 33 gallons and not sure if it can support such a population of brittle stars and my 95 gallon is still about a month or so from starting up should I be worried with the brittle star population or should I start eradicating them?