Tiny white/gray star fish

Torsionpain

Cleaner Shrimp
M.A.S.C Club Member
#1
Just found 2 tiny white/gray star fish on my live rock. Are they good or bad? Also wondering if the are dangerous to corals. I heard some star fish eat coral. If bad, do I squash them, pick them off, or is there something I can buy to get rid of them? Any help will be appreciated.
 

Torsionpain

Cleaner Shrimp
M.A.S.C Club Member
#3
The starfish look just like the ones from the video. Are they good or bad? For now I'm going to see if I can find them again and pick them off. Thanks.
 

Rebel

Anthias
M.A.S.C Club Member
#4
Most likely they are asterina starfish--pea sized irregular shaped fat bodies? Legs of different lengths?

There is debate about whether or not they are harmful, but IME and IMO most of them are more a nuisance than actually harmful. Of course, trying to positively identify an animal like that from a description or even a picture will not cover every case or actual type--but most people have or have had asterinas in their tanks with no ill effects.

Some say they multiply with overfeeding or with poor water control. I cannot say for sure--but I have them in my tank and have always had them in my tanks and cannot say that I could pin any deaths or problems on them.

Hope that helps.
 

that0neguy1126

Registered Users
M.A.S.C Club Member
#5
99% of them are good. A very few types are predators of zoa's and other corals. No way to know though unless you see them on the coral
 

CRW Reef

Blue Whale
M.A.S.C Club Member
ex-officio
#6
Re: Tiny white/gray star fish

They may not all eat zoas but the all sure irritate them in my experience :D
 

FinsUp

According to my watch, the time is now.
M.A.S.C Club Member
#7
If you want a natural asterina eradication device, think about getting a harlequin shrimp. All they eat are starfish, so you want to have copious amounts of them in your tank before you bring one home, or they'll die of starvation, but they're darn cute. I'm trying to figure out how to put one in my nano and keep him well fed because I love the lil guys.
 
#8
Define "copious amounts" please. Don't you play doctor and amputate the starfishes arm? Next day find an starfish to donate an arm to the cause and repeat.
 

FinsUp

According to my watch, the time is now.
M.A.S.C Club Member
#9
dr.schlegs;228790 said:
Define "copious amounts" please. Don't you play doctor and amputate the starfishes arm? Next day find an starfish to donate an arm to the cause and repeat.
I didn't go to medical school, but slicing off pieces of starfish without their informed consent seems... not very nice... at least to me.
 

djkms

Reef Shark
M.A.S.C Club Member
#10
Re: Tiny white/gray star fish

I had them. They wiped out huge prized colonies of expensive zoanthids within days. This after being visible in my tank for a couple years without harm. I fragged a couple polyps from each colony and the stars decided to take out the rest.

I let the stars be for 2 years so when they went rouge and started in on the colonies I couldn't keep up pulling them out. I had them in my fuge and frag tank as well.

I have a harlequin now, wish I got it sooner.

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