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Full tank pics here

Try this post: >what are these< HTH,

I'd also suspect the Sally - but -- how long have you had the Brittle? New acquisition, or has it been a tank resident for a long time? Any recent significant shifts in temp/pH/salinity?

Yes (see more on this below). That's the problem here. Acroporas are often labeled as "difficult", but how many are kept successfully? Hundreds of thousands. Idols are not difficult to keep, they are virtually impossible. They require a continual supply of live sponges and algae, and must...

All Nori is - is dried seaweed. Sounds like you bought expensive Nori. ;-) Try here - this is where I get my Nori & Dulse: > RawHealth.net < On the left side is a link for "Seaweeds - Dulse & Nori". 50 sheets of raw Nori = $12.00. My grocery store gets $7.25 for 6. :-( Btw, looks like...

Beware of getting into the habit of trying to maintain corals by 'feeding' them. 99% of corals' "food" is light. With some LPS, they may tend to be more meat-eating, but in general, their primary food should still be light, and any 'meaty' food should only be what they catch when you feed the...

Looks like Cladocora sp. Common to sandy reef shallows, and found in the Atlantic. Aka "tube coral". It's in the Faviidae family, and is closely related to Caulastrea sp (Trumpet coral). >Link --> Cladocora caespitosa< HTH,

Yep, totally harmless - and good. You're welcome. ;-)

Spaghetti worm (Terebellid sp.). You may only see the extended tenticles, but here's a link to a pic of what the whole thing looks like: http://depts.washington.edu/fhl/zoo432/falsebay/fbspecies/terebellid.jpg Check this link, and about 2/3 of the way down, you'll find info. on Terebellids...

Cryptoplax larvaeformis. It is a type of chiton which has shell plates on its back. It can be found in the book "Coral Reef Animals of the Indo-Pacific" (Allen/Steene). The description is: "owing to the reduction of the shell plates and increased girdle, this species looks more like a worm...

They are nocturnal - you'll see them mostly during your "dusk" period (if you have one), or after 'lights out' - or ... at feeding time. ;-)

I don't see huge problems here - mostly normal stuff with a relatively new tank. pH is a bit low -- but a pH monitor would be more accurate. A better test would be the difference in pH right before the lights turn on, vs. right before the lights turn out. 7.8 should be your lowest (right...

Another ... http://www.wetwebmedia.com HTH,

Interesting. I definitely don't think it's an algae. Almost sure on that one. A clearer pic - and maybe one not so close - kinda portraying 'how' it sits in the tank (relative size, etc.) might be helpful.

Hmmm .... well, the fish thing maybe - at least better overly cautious than under-cautious. BUT -- corals would definitely need a more stable tank than would fish. And, of all the soft corals available, mushrooms are definitely the most hardy. Sounds like your LFS is at least trying to be...

What kind/wattage of lighting, and depth of tank? Ours is at the bottom of the tank, but it's under a lot of light. Typically, they are mounted into a rock crevice or hole. Placement depends on the intensity of your lighting.

What kind of coral? Can you post your tank specifics? -- Water parameters, lighting, etc. What kind of lighting was it under? How did you acclimate?

What Kevin said. The exact species is >>Tritoniopsis elegans<<. Infamous for feeding on soft corals. (pics from SeaSlugforum link): HTH,

Nice pic. They are Spirorbid Worms. Harmless filter feeders.