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FAQs on the Hydrozoan Identification 4 Related Articles:
Hydrozoans,
Cnidarians,
Fire Corals, Stylasterines,
Hydrozoan Jellies,
Related FAQs: Hydrozoan ID 1,
Hydrozoan ID 2,
Hydrozoan ID 3, Hydrozoan ID 5,
&
Hydrozoans 1,
Hydrozoans 2,
Hydrozoan Behavior,
Hydrozoan Compatibility, Hydrozoan Selection,
Hydrozoan Systems,
Hydrozoan Feeding, Hydrozoan Disease,
Hydrozoan Reproduction, Medusoids/Jellies
(Ctenophores, some Hydrozoans, Scyphozoans): Jelly Identification,
Jelly Behavior, Jelly
Compatibility, Jelly Selection,
Jelly Systems, Jelly
Feeding, Jelly Disease,
Jelly Reproduction,
Fire Corals, Lace
Corals,
Stinging-celled
Animals
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help indentify a red/brown
type algae... no pic, poor English... no reading 03/15/2008
I have this reddish/brown type growth (im sure a algae) here is the
description.
<Umm, really need a good photo...>
It is very fine. It grow approx. 2 inch in height. It looks like i a clump of
daisy's (Flowers) You could say it looks similar to a daisy, and moves like a
waving hand's coral. It spreads quickly. Every 3 days it will die down where
there is no flower on top, looks like dead hair grass algae, but blooms again
into a full daisy. I have removed by hand but it breaks apart easily, and of
course attaches somewhere else. I have scrubbed it off. and again back in full
force. My tank is a reef friendly one. Tangs/crabs/snails/urchins/Seahares none
of them won't touch it. It will spread to any of my hard corals that are
damaged. But the coral will not die from it. (Not yet anyway) I have looked at
many on line pictures or red hair type algae. But nothing looks exactly like it
just some similarities. I would like to know if you have any idea what it might
be, and if so, any cures? Your help would be greatly appreciated. Thank you. mc
<... a pic please. That and/or a long read on WWM re Algal (et al.)
Identification: http://wetwebmedia.com/marinvind1.htm
Bob Fenner>Red/brown type
algae identification... Hydroids likely 3/19/08
Bob Fenner, thank you for your quick response. Attached are photo's
of my mysterious algae as per your request. Again description: It is
very fine, reddish/brown in color. Grows like a bad weed. Moves like a
wavy hands coral. Has a flower type (Daisy) top on it.
<I see this... am glad you sent along such large file sizes...
Cropped... maybe Myrionema or such...>
Every 3 - 4 days the flower dies down, and what's left looks like red
hair type algae, but will rebloom again. If moved by hand it breaks
apart easily. Will attach to any coral that is damaged (hard coral) but
doesn't seem to kill it yet. Your help of what it is, and what might
help get rid of it? Again your help would be greatly appreciated.
Thank you. MC
<I do believe this is likely a Hydrozoan, not an algae... Need even
"closer-up" pix to determine. Read here:
http://wetwebmedia.com/hyzoanidfaq.htm
and the linked files above... part. re Comp.
Bob Fenner> |
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Can You Identify This Please…
Hydroids – 03/08/08
Hello
<Hi there, Mich here.>
I have a 125-gallon marine tank that has been up for about 6 months -
this is my third tank. Can you please tell me what the small brown
things are - I believe that they are either a cluster of tiny glass
anemone (I haven't been able to find any pictures on the web of tiny
clustered glass anemones but did read on WetWebMedia that they do come
very small)
<Nope.>
or some sort of tiny cluster feather dusters.
<They are hydroids, perhaps Myrionema sp. They can be a nuisance and you
will need to wear gloves when removing them as they can deliver a sting.
They seem to be about 1/4 inch long each. Let me know if the photo is
not good enough and I will get a friend with a better camera to take a
picture. They are so little it is actually difficult to see the details
of them.
<The picture is fine. There also appear to be worm snails (Petaloconchus
spp) in the background, which are harmless filter feeders, but be
careful when moving about them as they can be quite sharp and easily
puncture finger tips.>
I do know what a normal glass anemone looks like and have had them
before but never this tiny. I did read on the site that the fish will
avoid them and I have not seen any fish stung but they do seem to avoid
them. If these are glass anemones I will try to remove them,
<Hydroids are pests and should be removed.>
my biggest problem will be that they are on one of the rocks my feather
duster is attached to, which is reasonably close to one of my bubble tip
anemones. Can you suggest the best way to remove these without damaging
the feather duster or the bubble tip anemone assuming it is tiny glass
anemones.
<Well removal can be a bit of a challenge. If possible, you should
remove the rock from the system while you go about with the removal of
these buggers so they are not accidentally spread. You will likely have
to remove the top layer of the rock, as much as an inch with a chisel or
Dremel as these pests can attach themselves quite deeply in the rock.>
thanks for your help and for this wonderful resource.
<I am happy to help and I too thank all who have contributed to this
tremendous body of work. I was a student here before I was a teacher.>
regards Jackie for NZ
<Cheers, Mich from the good ole US of A.> |
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ID please
-02/29/08
Please see attached. I can't tell what it is, but hopefully someone
can. :)
<I'll try!>
Grows very tree like and on top of a colony of some palys. The 'polyps'
withdraws into itself and tips becomes a whitish color (like the ones up
the top of the picture). When they're open, they resemble zoas/palys,
with a green center.
http://ericdo.com/pictures/Starfire%207.2.07/unknown_soft_022708.jpg
<Wow, that's certainly something different. Is there any chance you
could get a close up of the open and closed polyps?>
Please let me know if you guys can ID it.
<To be honest, I'm not even entirely sure it's even a coral... but maybe
some type of hydroid? More pictures will help.>
Many thanks,
Eric
<Best,
Sara M.>
ID please -hydroids 02/29/08
<Eric-
Just following up... I asked one of my friends who is more of a marine
invert ID expert and he agrees with my guess that it's a hydroid of some
sort. But more importantly, he was able to explain a bit of why he
thinks so. The tubes are brown and translucent which suggests they're
proteinaceous, not calcium carbonate. That means it's not a coral. And
neither of us can think of anything else (except a hydroid) that would
have branching proteinaceous tubes (and have polyps) like this thing
has. Hydroids are extremely difficult to ID, but if I can narrow it down
more at all, I'll let you know. :-)
Best,
Sara M.> |
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Outstanding. RMF. |
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Need Help With An ID
No One Knows In My Reef Forum 2/24/08
<Hi Jim, Mich here.>
I bought snails from the LFS and on 1 of the shells was this aiptasia
looking thing, that's what I assumed until it released itself and
started swimming. It swims like a octopus flailing its tentacles I've
posted on a reef forum and looked all over the Internet researching this
thing but have come up with nothing. Any help would be appreciated.
<Looks like a hydroid jellyfish to me. More here:
http://www.ronshimek.com/Animal%20Groups%203%20Cnidarians.htm
http://www.wetwebmedia.com/jellyidfaqs.htm >
I do have it in a catch bucket but was wondering if it’s safe to put it
in my reef.
<Likely wouldn't hurt. Populations tend to wax and wane. Is interesting
to observer for sure.>
Thank you for any help you can give me.
<Hope this helps. Mich>
Jim |
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What is
this??? Hydroid Jellies (Staurocladia oahuensis) and Gas Bubbles.
1/17/08
Hi everyone!
<Hi Rachel!>
I have a couple questions with pics attached. The first is, what are
these white things on my glass?
<Looks like hydroid jellies (Staurocladia oahuensis) to me. Nothing to
be concerned about. They typically come and go. More here:
http://www.wetwebmedia.com/jellyidfaqs.htm
http://www.ronshimek.com/Animal%20Groups%203%20Cnidarians.htm >
They just showed up this afternoon. They look like star shaped bugs or
white spiders of some sort! I am getting close to the end of my cycle
with 0 ammonia, but my nitrites are still high. I am cycling with live
rock. (70 Lbs.) 55-gallon tank. Are they parasites? Will they be harmful
to fish when I add them after cycle completion?
<No.>
The other photo is my substrate. These brown colored seed like things
are starting to show up in my substrate. Are they eggs?
<No, I think you are seeing the formation of gas bubbles. Typically
nothing to worry about.>
I know I sound negative but I don't know what all these things are and I
don't want anything harmful to my new fish when I add them.
<No worries. Better to be safe than sorry.>
One more last question :) My ammonia has been 0 for two days now. My
nitrites are as high as the chart will read for two days now. How long
until my nitrites drop to 0?
<I'm sorry about the delayed response. I'm fairly certain that they are
likely dropped by now.>
20 lbs. live rock introduced 3 weeks ago, and another 50 lbs. added one
week ago.
Thank you once again for ALL of your help!
<Welcome! And I'm sorry for the delayed response. Mich>
Rachel |
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Hydro ID and
help – 1/04/08
Hi guys,
Thanks for maintaining such a wonderful site. I have been visiting this
site for over 4 years now and have always found to be a great source of
information. I need a little help though, and would appreciate it if you
guys could give me a hand.
<Will gladly render my input>
I'm looking for a positive ID on this little critter (see attached).
After exhausting all resources here at WWM on Hydrozoans, I went looking
for better classifications of these guys and I found a great site for
identification:
http://www.ville-ge.ch/mhng/hydrozoa/hydrozoa-directory.htm. I think
I've come to the conclusion that this is probably
Class Hydrozoa,
Order leptomedusae
Family Malagazziidae
<Appears so to me as well>
I only see them in the Hydroid colony stage. Hopefully I'll never see
the medusa stage ;)
<Is, will be there in time... likely being removed by your mechanical
filtration>
Anyhow, looking through the articles at WWM I'm trying to find out how
to really get rid of these guys. Everything I've seen at WWM says starve
them out and remove the nutrient rich environment. My question then
becomes "what nutrients?"
<In boldest statement of what can be easily measured, soluble nitrate,
phosphate...>
What do these guys depend on to grow?
<Mmm... some chemical base, micro-fauna... a dearth of predators,
competitors>
Although, the appearance of these things seem to correlate with my use
of Koralle-VM from Brightwell Aquatics. I have since changed to
Coral-Vital from Marc Weiss Companies, Inc to see if it will have a
different effect.
<I would drop this Weiss product... and most all of its ilk>
They also seem to be accompanied by this brown looking mush on the live
rock.
I have an 11 Gal Aqua-via tank, with an Aqua C remora Protein skimmer
with Maxi Jet 1200, 25lbs LR and a 3in sand bed. I only have a couple of
zoo's and a single clown fish. Not really much of a bio-load here. The
Aqua C should be more than enough of a protein skimmer for this
tank/load.
Any ideas on how to starve these guys out? Any specifics would be
greatly appreciated.
Thanks,
Jas
<Mmm... well... I might try a small shrimp (or two)... perhaps Lysmata
wurdemanni... in the hopes of them eating up the hydroids.
Bob Fenner> |
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Attn: Anthony Calfo
-11/19/07
Hi Anthony.. Just wanted to say thanks for your presentation in Northampton
PA. It was very entertaining and enlightening. I was the guy who sat right next
to you during the lunch. And I had asked you about a certain brownish stringy
growth in my tank. You had said that it sounded like a form of something (not
Cyano), but I'm having trouble remembering what it was that you suggested it
might be. If you recall our conversation, could you please restate the name of
the stuff that you thought it might be? Once again. thank you so much for an
informative presentation.
Jeff D.
Thanks Bob/WWM crew for forwarding
Cheers, Jeff
I mostly recall the conversation... hmmm, was this a discussion about a
filamentous hydroid? That's what's ringing a bell to me.
Can you share a picture by chance?
Hairy turbo
snail... Hydrozoans
Hi,
<Hello there>
I love your website--it has been a lifesaver for a newbie like myself.
<It is for you we generate it>
I have searched and searched but cannot find out what this is attached
to my turbo snail. They look like tentacles, are in pairs and about 4
sets hanging out on him/her.
Thanks in advance!
Amber
<I see these... small, "fuzzy" hair-like projections... They're likely
hydropolyps... Hydrozoans... stinging, yes, but not likely a real
problem here. Please read: http://wetwebmedia.com/hyzoanidfaq.htm
Bob Fenner> |
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