live rock hitchhiker identification?

cipolla6

Feeder Fish
MFK Member
Apr 14, 2008
56
0
0
niagara falls
Found some interesting live rock at the dreaded petco and decided to grab it. When I got it under the light a lot of things opened up. I'm new to salt but it appears to me that at least one of them are zoanthids but if anyone Conan confirm this assessment and I'd any of the others I'd appreciate it. I just want to provide optimal care.1411489677915.jpg1411489717615.jpg1411489753530.jpg

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squillaempusa

Feeder Fish
MFK Member
Mar 10, 2013
23
0
0
nj
first pics are absolutely NOT aptasia. they are what's called "yellow polyps" believe it or not. they're very similar to the polyps in the other pics, but they're a little on the aggressive side.
 

Wailua Boy

Potamotrygon
MFK Member
Jan 2, 2015
2,752
1,315
164
Hawaii
It's a close call, hard to tell from pic...Aiptasia do range in color, depending on lighting mostly. I would poke it, gently of course, see if it retracts downward. If so it's Aiptasia(opposed to just closing)
 

mattyice572

Black Skirt Tetra
MFK Member
Mar 25, 2015
60
4
13
New Jersey
None of these are parasites, you have a few different species of zooanthid polyps here. That first pic is not an aiptasia anemone it is a yellow polyp.
 
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