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Best, first guess would be a Foraminiferan. Chuck
Yes, and I'm glad to hear such pages are of use, or at least I hope they are...lol Chuck
1- Probably a Scolymia spp. 2- Probably a Favia spp. Can never be 100% sure with photographs. Pictorial Coral Genus Groups Chuck
I would guess at it being a Sargassum species. (kelp). The Natural Reef Aquarium - Part Four Chuck
I would have thought the same except it was described as being able to curl back, not something a foraminiferan can do. Chuck
The first one is probably the feeding appendages of a sea cucumber species and the coral is most likely a Favites spp. Stony Coral Genus Groups...
No telling, could have been a worm also. Have never seen nor heard of any Crinoid associates up for sale, sorry. Chuck
Again, Good luck with it and I do hope you can keep it longer than "past a year" as I would not say that is considered long term at all. Have you...
Good luck with keeping it alive as I know of no one that has kept one long term, they need a near constant supply of drifting marine snow (detritus)...
Looks to be a very common Eurythoe species and is a good member of your clean up crew. The original A Hitch Hikers Guide to the Reefs Chuck
Its a Sipunculida species, commonly called a "peanut" worm and is a harmless detrivore. A Hitch Hikers Guide to the Reefs Chuck
The common Xanthidae species found in/on live rocks do need to be removed as over time they can become quite destructive, but the commensal coral...
Depends a great deal on the species. There are hebivores, planktivores and parasitic members in each of the groups (copepods, amphipods, isopods),...
Will need much closer photos to have a chance at identifying anything, although the second photo appears to be a sponge. A Hitch Hikers Guide to...
If you know exactly where it is within the rock, I would very carefully dribble a bit of vinegar into its hole while trying to avoid spillage over...
From your description and what I can see of it in the photos, I would say it is a polychaete (worm) egg mass. Chuck
I would guess at it being a Cirratulid species (aka "hair worm") which are harmless scavengers of detritus and good members of any clean-up crew....
Its a solitary tunicate. Hitch Hiking Sponges & Tunicates Chuck
The biggest problem with such worms is having hobbyists group all of them into being all the same, which is where their bad reputation came from...
Yeah, could easily be Anthellia as well. Time will tell. Chuck
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