FAQs about Live Rock
Related Articles: Live Rock, Reef
Related FAQs: Live Rock, Answering
Some LR FAQs by James Fatherree, LR
Hitchhiker ID 1, LR Hitchhiker ID
2, LR Hitchhiker ID 3, LR Hitchhiker ID 4, LR Hitchhiker ID
LR ID 6, LR ID
7, LR ID 8, LR ID 9, LR ID 10,
LR ID 11, LR ID
12, LR ID 13, LR ID 14, LR ID 15,
LR ID 16, LR
ID17, LRID 18, LRID 19, LRID 20,
LRID 21, LRID
22, LRID 23, LRID 24, LRID 25,
LRID 26, LRID
27, LRID 28,
LRID 30, LRID 31,
LRID 32, LRID 33,
LRID 35, LRID 36,
LRID 37, LRID 38,
& Non-Vert IDs 1, Tubeworm ID, Polychaete Identification, Live Rock 1, LR 2,
LR 3, LR 4,
LR 5, Curing
Live Rock, Live Rock Selection,
Shipping/Moving, Placement, Lighting, Water Quality, Live Rock Studies in Fiji Collaboration
& Charts, Copper Use, Marine
Landscaping, Marine Biotope,
Sumps, Refugiums, Faux Rock,
Any idea on what this might be. It's on a piece of live rock I have. I saw the
first signs of life out of it yesterday and I have had the tank setup for
roughly 5 months now. Thanks
<Arca; a bivalve. No worries. Bob Fenner>
Aiptasia Anemone 1/11/12
Hello good folks at WWM,
I was re-scaping my live rock last night and discovered this on
one of my pieces. I have no idea what this is and I have searched
throughout your site and Google to no avail. I'm not even
sure of how to describe it. I thought maybe it was a polyp but my
search results ruled it out. Hopefully the picture is clear
enough. It has a ring-like shape that is white in color with a
transparent center and it has "hairs" or
"tentacles" sticking out from it.
<It appears to be an Aiptasia Anemone Read here
I haven't seen it move at all. It might be dead.
<Not enough information for me to answer but these are tough
lil' buggers and they can become a nuisance/predator if
Thanks in advance,
<Welcome in arrears Chris, BryanC>
Re: Aiptasia Anemone
> Hello good folks at WWM,
> I was re-scaping my live rock last night and discovered this
on one of my
> pieces. I have no idea what this is and I have searched
> site and Google to no avail. I'm not even sure of how to
describe it. I
> thought maybe it was a polyp but my search results ruled it
> the picture is clear enough. It has a ring-like shape that
is white in
> color with a transparent center and it has "hairs"
or "tentacles" sticking
> out from it.
> <It appears to be an Aiptasia Anemone Read here
> I haven't seen it move at all. It might be dead.
> <Not enough information for me to answer but these are
tough lil' buggers
> and they can become a nuisance/predator if unchecked>
> Thanks in advance,
> <Welcome in arrears Chris, BryanC>
> I was looking on the web at pics of Aiptasia Anemones and
what I have on
> my live rock looks different. Upon closer examination i
found that it was
> connected to a similar shaped ring that was flat on the live
rock. So all
> together it looks like a bi-valve. From what I saw on-line
> Aiptasia Anemone, they normally are attached to the live
rock by tubes.
> Mine doesn't have that.
><Maybe a more clear picture will help, BryanC>
Please help me ID this. 1/11/12
I found this moving on my live rock this morning. It is
"ball" shaped and looked almost spongy. It is
yellowish in color with a red spot on the back end. It had
a tail which was translucent/white like a snail and it had
two antennae/tentacles. It moved like a snail or a slug
would and was actually pretty quick. It's actual shape
had me thinking it was sponge, but I have no clue. I hope
it's nothing bad, it was actually pretty cool to
<... this and the last, grey tiny pic/organism you sent
are very like both Sponges. Poriferans. See WWM re. Bob
Re: Please help me ID this. 1/11/12
Thanks so much. So for the ball shaped one, since
it's moving does this mean it is still in the
larvae stage? Would you say that these are good things to
keep in my nano reef?
<Mmm, send along a better-resolved image please.
|Re: Please help me ID this.
I will take a better one when I get home from work. Thanks
<Thank you, B>
please help me identify this.... 11/30/11
<Poor English and eight megs of pix... Ridiculous. Did you
read where you found how to write us?>
i was trying to figure out what this is growing on the back and
side of my rock in certain area's....the bottom base of it is
purple than it's a orange looking dot in the center of
them...i attached a picture, i tried to get as close as i could
to it to catch the picture...
<Your images are too poorly resolved to see much... these look
likely to be sponges/poriferans of some sort. Bob Fenner>
|Re: re: please help me identify
when i touched them they are soft and bouncy.
<Still many possibilities... B>
identification... Under rock...
Hey guy and gals, I am sorry for not having a picture but I have not
been able to take one that is clear and shows this good enough. There
is a clear film (or hairlike) growth on the bottom
side of my live rock. I am hoping it is common enough for you to
identify. If I scrape it with a brush it comes off. It is not where the
light can hit it, only on the bottom side of the rock. Any ideas?
<... an algae? Sponge, slime mold... accumulated debris?
Strange Growth/Algae ID 11/9/11
I have a marine tank of 44 Gallons and have a strange thing
growing and wondered whether you can identify it.
<Appears to be Neomeris annulata, a green algae.>
<You're welcome. James (Salty Dog)>
Re Strange Growth/Algae ID, Neomeris
Thanks for the quick response.
<You're welcome. James (Salty Dog)>
Strange growth on fossil in tank 11/6/11
I have looked everywhere and I can not identify this growth on an
old skeleton in my tank. Can you help me identify this please? It
was growing in the dark at the bottom of a stack of rocks in my
tank. I noticed it
today as I was rearranging the rock for more caves. It is hard
and does not move if I move the rock Thank you in advance for you
Hope all is well,
Jodi L. Sardina
<Thank you; yes. These are very likely snail eggs... Do look
up for the species you have here on the Net. Bob Fenner>
Fans? SW... 11/1/11
I have had my salt aquarium running for over 7 years. I noticed
these little tubes growing lately. they don't have fans in
the tips. Any idea what they might be? Good or bad?
<... Image please. Likely what you have here are some sort of
though could be one of many other possibilities. See here:
and the linked FAQs files in the series (above). Bob
Oh! I do see your pic attached... This appears to be some sort of
but might again be summat else... BobF
hitchhiker id -- 10/07/11
I haven't thanked you enough for all of your assistance, this
website has been a great help to me in many ways! Not the least
of which, entertainment!
<Oh yes... Intended to not be just dry information
presentation, but fun as well... For all!>
Anyway, I was wondering if you would be able to ID what I have
circled in yellow. It arrived as a hitchhiker, and I was
wondering what it was, and if it presents any issue. Please and
thanks as always!
<Mmm, interesting... Can't quite make out what this might
be, even enlarging... Looks to be a composite of organisms...
Perhaps a sponge, w/ Foraminiferans (the roundish bits) on it...
but could be otherwise,
additional life forms. Not likely harmful. T'were it me/mine,
I'd leave it in place. Cheers, Bob Fenner>
Net fishing animal...
I Googled the web, scan your site and could not find an answer to
I recently bought a fragment of sps coral and glued it to my live
Yesterday I noticed a brown animal that grew at the base of it.
It seems to be some kind of worm and I can't identify it. It
has a very special way of feeding. For a few days, I noticed tiny
filaments, like some kind of spider web in that area. I finally
realized it is generated by that animal. It kind of throws a net
of very fine threads that stick to the surrounding live rock. It
takes a few minutes to complete the work. Then it stands still.
Tiny bits of particles suspended in the water column stick to the
net. After a few minutes wait, the animal pulls back it's
net, apparently swallowing it with it's catches. And then the
cycle goes on again and again.
I took a picture of it. It is the brown shape in the middle of
It is partially hidden by a part of the coral base. It is also it
it's shadow, which didn't help the picture... The thing
is about a centimeter long, and doesn't move or contract.
What is it? Any danger with it? I hope not, because it is
fascinating to watch!
<Is likely a species of "spaghetti worm"... A member
of the Polychaeta, perhaps the family Terebellidae. Not
Thanks for your help!
<Welcome. Bob Fenner>
Re-sized images to identify 5/29/11
<Will send to him>
Thanks for your help! I found a site to re-size the pictures!
They are attached.
<These are all remnants/types of sponge... Poriferans. Bob
|re: Re-sized images to identify
Thank you for identifying! That was very helpful!
<Certainly welcome. Their growth is a good indication of
healthful conditions in your system... Much more re on WWM.