Sea spider

Shawnman

Active Member
View Badges
Joined
Apr 22, 2023
Messages
195
Reaction score
84
Location
Buffalo
Rating - 0%
0   0   0
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
 

ISpeakForTheSeas

7500 Club Member
View Badges
Joined
Nov 22, 2021
Messages
9,362
Reaction score
10,745
Location
United States
Rating - 0%
0   0   0
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.
 

VintageReefer

10K Club member
View Badges
Joined
Nov 16, 2023
Messages
19,172
Reaction score
34,122
Location
USA
Rating - 100%
3   0   0
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
 

areefer01

5000 Club Member
View Badges
Joined
Jun 28, 2021
Messages
5,668
Reaction score
5,884
Location
Ca
Rating - 0%
0   0   0
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.
 

Yang’s Blue Paradise

Well-Known Member
View Badges
Joined
Mar 7, 2023
Messages
788
Reaction score
668
Location
Flemington
Rating - 0%
0   0   0
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
 

ISpeakForTheSeas

7500 Club Member
View Badges
Joined
Nov 22, 2021
Messages
9,362
Reaction score
10,745
Location
United States
Rating - 0%
0   0   0
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.
 
OP
OP
Shawnman

Shawnman

Active Member
View Badges
Joined
Apr 22, 2023
Messages
195
Reaction score
84
Location
Buffalo
Rating - 0%
0   0   0
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.
 

Attachments

  • 20240102_205613.jpg
    20240102_205613.jpg
    67 KB · Views: 96

MCL in SD

New Member
View Badges
Joined
Oct 31, 2022
Messages
10
Reaction score
6
Location
San Diego
Rating - 0%
0   0   0
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
2025-12-26 22.09.45.jpg
2025-12-26 22.21.07.jpg
2025-12-26 22.21.15.jpg
 

TOP 10 Trending Threads

WHAT AMOUNT OF LIVE ROCK AND SAND SHOULD BE PRIORITIZED FOR OPTIMAL BIODIVERSITY/FILTRATION?

  • 100% live rock + bagged sand

    Votes: 38 26.2%
  • 100% dry rock + 100% live sand

    Votes: 48 33.1%
  • 50/50 live/dry rock, 50/50 live/bagged sand

    Votes: 33 22.8%
  • 75% live rock, 25% live sand

    Votes: 15 10.3%
  • 25% live rock, 75% live sand

    Votes: 11 7.6%
Back
Top