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Swift_B_D
11/20/2012, 08:03 PM
Hello Reef Central. I hope this is an appropriate place to post this. Research has been done before I came here to ask, but, I came up pretty empty handed so asking here seemed to make sense.

Today in my 90 gallon (established for at least 6 years before I took it over) I noticed a few creatures riding the back of one of the medium sized snails. I'm not super concerned, but, I think knowing is better than ignoring with a project of this magnitude and expense. Here is a a picture of what appears to be some type of Copepod but never looked like any of the ones online for sure. It just didn't quite match any of them. They are roughly 2x the size of the Calanoid Copepods previously identified in the tank that numbered in the 1,000's.
http://imageshack.us/a/img534/9115/copepods.jpg (http://imageshack.us/photo/my-images/534/copepods.jpg/)


This next shot is difficult to really see but I'll try to explain it as well. They protrude from what appear very similar to snail shells. These "shells" lay flat and do not move at all, they are very much embedded or fused. The part that protrudes is spherical with a small white oval design on one side and a small mouth roughly in the center also outlined in white. I observed it pulling food into the "mouth" using suction, then noticed two antenna slowly work there way out. The thing is really, really, bizarre looking. There are at least 3 that I spotted so far.
http://imageshack.us/a/img844/8272/zoomofunidentified.jpg (http://imageshack.us/photo/my-images/844/zoomofunidentified.jpg/)

Anyways, I spend a lot of time with the tank and recently after finding my 10x eye loop have been having a blast identifying very small creatures living in it. It's really been amazing how much life exists unseen.

I have a couple shots of other up close pics.

Calanoids I believe
http://img521.imageshack.us/img521/2026/copepodsupclose.jpg (http://imageshack.us/photo/my-images/521/copepodsupclose.jpg/)

Hydroid Jellies?
http://img138.imageshack.us/img138/8346/hydroidsupclose.jpg (http://imageshack.us/photo/my-images/138/hydroidsupclose.jpg/)

Any thoughts/ideas would be great. Look forward to meeting you guys.

MARINECRITTERS
11/20/2012, 08:12 PM
Munnid isopods
vermietid snail?
copepods
hydroid jellyfish

Swift_B_D
11/20/2012, 08:36 PM
Thanks Marinecritters, you hit the isopods right on the money. You seem to be right about the vermietid snail too.

Side questions about the Hydroids, I can't really determine from what I've read on whether they are harmful or not. It seems they could grow into a a couple different things? They kind of concern me because tons of them popped up replacing the copepod population.

Thanks again.

SushiGirl
11/20/2012, 09:30 PM
Your jellies will go away in time. They tend to wax and wane.
Your 2nd ID are Hipponix snails based on your description of lying flat, having shells, and 2 antenna. I can't tell anything from the pic. If you looked up vermetid and that's what you're seeing, then I'm wrong LOL.

ReefUrchin
11/20/2012, 10:42 PM
vermatids have antenna/eye things also.