Sea spider

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Shawnman

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Last night during lights out i observed a tiny sea spider amongst my zoa colony. Should I leave it, no biggie or perhaps remove the entire colony /rock and dip in Coral Rx?

20231228_203310.jpg
 
Without being able to see the spider for an ID, it's hard to say if it's a harmful one or not. That said, there are zoanthid eating sea spiders, so it may be a good idea to get it out if for no other reason than to try and get a decent ID on it.
 
Can you capture it and get it in a jar or cup? While we await for the jury to decide it’s verdict - tank, sump, or flushhhhhh
 
Last night during lights out i observed a tiny sea spider amongst my zoa colony. Should I leave it, no biggie or perhaps remove the entire colony /rock and dip in Coral Rx?

20231228_203310.jpg

Friendly tip - it would help those you are asking help you if you could circle or and a pointer to the item in question. It will more readily point them to it rather than spend time playing Dora the Explorer and trying to find it.
 
Yeah if it looks like a spider it is mostly a zoanthid-eating spider. They look like this, I also had one of this in my zoas and you can easily pick them out at night. But I blieve they may lay eggs so I would be careful and keep mointor them. Although I haven't seen any since my first spider.
1703966537538.png
 
Yeah if it looks like a spider it is mostly a zoanthid-eating spider. They look like this, I also had one of this in my zoas and you can easily pick them out at night. But I blieve they may lay eggs so I would be careful and keep mointor them. Although I haven't seen any since my first spider.
1703966537538.png
Good pic there! Yeah, some species will lay eggs (sometimes physically inside corals) while other species will carry the eggs underneath them - I haven't looked into Zoa Eating Spiders specifically enough to know which they do though.
 
I just caught my sea spider with a pair of tweezers. I wasn't able to provide a picture of the actual spider because I didn't have one. The pic was just illustrating where it was residing and what I would have to dip if I went that route. Hopefully this is the only one.
 

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Good pic there! Yeah, some species will lay eggs (sometimes physically inside corals) while other species will carry the eggs underneath them - I haven't looked into Zoa Eating Spiders specifically enough to know which they do though.
sorry for replying to an old post, but can confirm they carry eggs on underside
I had a zoa chunk that seemed to be slowly losing polyps

took it out and used loupes to find a dozen spiders
one of them had eggs (I think)

I think the different color is because their digestive tract extends into the legs and the colored ones are filled with the digested zoas
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