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FAQs about Nudibranch Identification 2
Related Articles: Nudibranchs,
Sea Slugs, Related FAQs:
Nudi ID 1, Nudi ID 3,
Nudi ID 4, & Nudibranchs 1,
Nudibranchs 2, Berghia Nudibranchs,
Nudibranch Behavior, Nudibranch
Compatibility, Nudibranch Selection,
Nudibranch Systems, Nudibranch Feeding,
Nudibranch Disease, Nudibranch
Reproduction, & Sea Slugs,
Marine Snails 1, Marine Snails 2, Marine
Snails 3, | 
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ID Please, Nudibranch, Tritoniopsis – 9/29/07
Hi all
<Hello, Brenda here with you tonight.>
Please could you tell me
what this is, it is very beautiful, it is about an inch long, pale
yellow and hangs along the water line at the top of the tank, very
interested to see what it is and if it is reef safe. Please get back
to me as soon as possible. I have enclosed a photo hope you get it.
<It looks to be a Nudibranch that is known to eat soft coral. More
information here:
http://www.seaslugforum.net/factsheet.cfm?base=triteleg Hope this
helps! Brenda> | 
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Nudibranch 8/16/07
Hi Crew,
<T and D>
We recently started
a 70-gallon reef tank and have encountered a tiny slug-like creature
climbing the sides. Obviously it was a stow-away on some of our live
rock or coral. It doesn't have a shell, rather short protrusions out of
the length of its back. Our best guess is that it's some kind of
nudibranch, but we were unable to find anything on the web that
resembles this particular animal. (See attached photos.)
<Is a
Nudibranch of some sort...>
If it's not reef safe, we'd like to get
it out, but if it is, we're not sure how to take care of it. Any help
would be greatly appreciated!
Thanks,
Tisheena and Danny
<Due
to its small size... and lack of any apparent damage to your purposeful
livestock, I would leave this wee-animal be... it is very likely
consuming some aspect of your live rock fauna... And adding interest to
your experience. Cheers, Bob Fenner> |  .JPG)
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Nudibranch? Good or Bad? Hard to tell from the photo. – 06/26/07
Hi Bob:
<Hi Chris, You have Mich as your crewmember tonight.>
It's
been a few years, but any clue to what this is (see attached) and if
it's going to cause some issues in my Reef?
<Appears to be a
nudibranch, but I can't tell much beyond that from the photo. It is more
helpful to have a view of the dorsal side than the ventral side when
looking at sea slugs. Looks a little like an Arminid sea slug, but I
wouldn't put too much stock in this. You may want to check the sea slug
forum at http://www.seaslugforum.net/ >
Some on Reefcentral seem to
think it is a soft coral eater and I should remove it (them).
<Is
possible that this could be predacious on soft corals or other creatures
in your tank. Nudibranchs generally don't have terribly long life
spans.>
Do these reproduce rapidly?
<They are generally
hermaphroditic, and self-fertilization is rare. So unless you have two
or more in your tank reproduction is not likely. If there are two or
more about, there is more of a chance of reproduction but captive
rearing is generally quite difficult as there are specific dietary
requirements. I don't think you need to worry about plague populations
if this is your concern>
Thanks!
<Welcome! Mich>
Chris
Goldenstein | 
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Re: Nudibranch? good or bad? – 06/27/07
<Hi Chris, Mich with you
again.>
Thanks!
<Welcome!>
I was able to pull one out today,
got some pics from the topside...
<I see, this is definitely a
nudibranch, and still looks consistent with the Arminid sea slug
(Arminia spp.) mentioned earlier. Arminids are predatory on soft corals.
Therefore, they are not considered reef compatible. (Perhaps good for
those out of control xenia factories!) Bill Rudman's Sea Slug Forum will
likely be you best source of further information.
You might try a
search as below on the Sea Slug Forum if you wish to further identify.
http://www.seaslugforum.net/search_species.cfm
Order: Nudibranchia
Sub Order: Arminia
Superfamily:
Family: Armindae
Subfamily:
Hope this helps, Mich>
Chris
Re: Nudibranch? good or bad?
You guys rock! Thanks!
<Welcome!
Mich> |  
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Nudibranch, Sea Cucumber or Sea Slug? Aeolid Nudibranch 6/18/07
Dear WWM Crew,
<Hi Matt, Mich here.>
Yesterday I noticed an
unusual spot of bright green in my 120g reef tank.
At first I
believed it to be a nudibranch due to its body type, coloration and
behavior, but would like your opinion.
<I think you are correct
here. More here:
http://www.wetwebmedia.com/nudibran.htm
http://www.wetwebmedia.com/nudispt3.htm >
It has four or five
"tentacles" around a "mouth" which leads me to believe it may be a sea
cucumber, except that it is moving around the tank and not hiding in a
rock crevice like the other cucumbers I've seen.
<Not a cucumber.>
I took a couple hundred pictures trying to get a good shot, and have
attached a couple of the best images.
<Heee! I know that feeling all
too well!>
It's about a quarter of an inch in length and appears to
have the soft body of a mollusk.
I'd appreciate your help with the ID
of this live rock hitchhiker.
<Looks like an Aeolid Nudibranch to me.
These typically eat cnidarians and some resemble their prey. This
Nudibranch reminded me of Green Star Polyps (Pachyclavularia violacea)
or an encrusting gorgonian (Briareum spp.) and there is an Aeolid
Nudibranch called a Phyllodesmium briareum but the Google images didn't
so much look like your photos. You might try
http://www.seaslugforum.net/ if you want to attempt to identify
further.>
Thanks,
<Welcome! Mich>
Matt | |
Nudibranch ID - 6/7/07
Hi
<Hi Ian>
This question is mainly
about some form of identification for the attached photo,
tank
details first. My tank is approximately 50 gallons with 45lbs live rock
from Pacific area, 2 clown fish, 1 regal tang,
<This fish needs to be
in a much larger tank. These guys grow to almost a foot and are active
swimmers. Small tanks stress this species, which can lead to aggression,
disease, and an early demise. Please read FAQ's re:
http://www.wetwebmedia.com/paracsysfaqs.htm>
..and 2 blue Chromis, 1
cleaner shrimp, and 8 snails: 4 turbo and 4 strawberry.
Filtration is
through a V2 600 protein skimmer. Salinity is spot on, nitrate, nitrite
and ph are perfect. All levels are checked religiously every 2 -3 days.
The tank is about 2 months old now and I am a complete novice with
marine setups, but I do do quite a lot of research on the internet about
all of the new life that is springing up on my live rock.
<Good, lots
of great information out there!>
So the main question is this, what
is the slug in the photo?
<Appears to be a Dorid nudibranch, possibly
Dendrodoris nigra or Dendrodoris fumata? D. nigra is one of the more
common hitchhikers that appear in people’s tanks.>
He, she, it, has
acquired the name Gary and seems to be very curious about his
surroundings <Undoubtedly searching for food.> and seems to be causing
no problems with anything in the tank.
<Hehee - with the exception
of what's being eaten!>
I really need to know if it could cause a
problem in the future.
<Yes, it could well do that. Nudibranchs, in
general, are not good choices for aquariums because of their specialized
diets. Because of this, they don’t usually survive long term. Worse yet,
when these guys do die, they can release some nasty toxins. Please see
more information regarding this at WWM:
http://www.wetwebmedia.com/nudispt3.htm.>
He is about 1 inch long at
the moment and is a very dark blue, purple colour. All of the research I
have done suggests that he is a naked gill Dorid? But any pictures I
have found show these slugs as various colours whereas Gary is just one.
Any suggestions would be greatly appreciated.
<Color varies greatly
with these. Also, tank lighting can be a factor as far as what color
they appear to be. For further ID information, I’d refer to the SeaSlug
Forum. Here are several links to get you started:
http://www.seaslugforum.net/display.cfm?id=4181
http://www.seaslugforum.net/display.cfm?id=1217 >
Thank you in
advance. Ian.
<You're very welcome. -Lynn> | 
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Nudibranch ID - 6/1/07
<Hi Tom>
I was hoping you could help me
identify this Nudibranch. It is all black with no other markings (that I
could make out). I found it in my tank and would like to know if it's
good or bad.
<I’m sorry, but without a better photo, and a little
more information (size, where it came from, etc) the best I can offer is
a guess. It appears to be a species of Dorid Nudibranch and if it was in
my tank, I’d remove it. They don’t usually survive long term because of
their specialized diets. Worse, is that when they do die, they can
release some nasty toxins. Please see more information regarding this at
WWM:
http://www.wetwebmedia.com/nudispt3.htm. You might also want to
check out the Sea Slug Forum, it's excellent. Here’s a link to a black
Dorid (Dendrodoris nigra) there for comparison:
http://www.seaslugforum.net/display.cfm?id=4181 >
Thanks
Tom
<You're very welcome! -Lynn> |  
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Unidentified nudibranch 5/11/07
Hello Bob,
I was
told by a member of ReefCentral to email you with the link to this
thread. I found this nudibranch in my aquarium apparently eating my
coral. If
you know what it is, is there any chance you could let me
know. I also have numerous other photos.
Thanks,
Steve
http://reefcentral.com/forums/showthread.php?s=&postid=9922933#post9922933
<Well... is an Aeolid... maybe a Phyllodesmium species, perhaps a
Flabellinid species... predaceous on stony corals for sure. You might
want to send your query over to seaslugforum.com, a fab resource re this
group. Bob Fenner> |  
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Pics and ? Nudibranch and polyp/anemones 3/28/07
Hi there to
all the crew. My name is Tracey. I have a 125 gallon reef tank and have
for about 13 years now. I have two things I would like to address here.
First, I have a couple of colt coral that started suddenly not doing
well. Like they were being stung,
<Consumed, predated...>
but
nothing was near enough even with current that would make that probable.
I needed to top off my water and added my upped the alkalinity just
enough to irritate the critter that was causing the problem to come into
view. I am attaching a pic of this beautiful guy which I think is maybe
a Nudibranch?
<Yes... at least a Opisthobranch/Seaslug...>
I'm
surprised to see this now as I have not added anything new in months. I
took him out and place him in quarantine until I learn more. I have seen
and removed these before quite some time ago, and they had more of a
pink color but were smaller. This guy is about 1 1/2" long and 3/4"
wide. I removed him with tweezers and he had a sticky and slimy
substance left behind what ever he came into contact with. I have found
them near the base of the colt only. I'm not seeing flesh decay of the
colt, it looks more like it being stung though I'm not certain. The base
of the colt looks like it is separating some from the rock. He looks
better already after only an hour of removing him.
<Is/was being
chewed... keep your eyes peeled for others>
Ok, my next issue is
this. I have several different polyps in my tank and have had a new
species of some sort pop up and they multiply quickly. They split in
half and they just move around and make more, even through the current.
They grow on the glass, in the sand, on the rocks like crazy, and I have
seen them grow attached to other coral. I'm wondering if this is some
type of anemone rather than polyps.
<Mmm, some pix look like
Zoanthids... others summat like Anemonia species>
I did have an
Aiptasia problem and got that problem under control, so I'm pretty sure
that's not what these are. I took out a few rocks that are just covered
in about a months time and quarantined them also. I'm sending a few pics
of these as well. Thanks in advance for your time and help. I love this
site.
Tracey
<Do take a scan on/over WWM re these species...
best to not let proliferate/cover too much of your LR. Bob Fenner> | 
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Berghia verrucicornis ID 3/16/2007
Hi Richard, Mich here
today, not sure who helped you previously.>
Thanks for all your
help.
<On behalf of the crew, you're welcome.
I will order the
book about cnidarian, one more question please:
Is this Berghia
verrucicornis (Aiptasia eater)?
<Sure does look like it!>
Thanks.
<Welcome. Mich>
Richard |  
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Nudibranch pics from India.........
2/9/07
Hi there,
hope u are having great day!
This Sam here.
I had
recently visited my local beach where I found this Nudibranch specimen.
I have now, preserved the specimen in glycerin for identification by our
local Marine Biologist.
But they are in the field now Diving and
Observing marine life at Lakshadweep Islands!
I live in the City of
Bombay, India.
I am attaching a few pics, see if u can ID it for me!
Thanks in advance,
cheers!
Sam
<Very nice... Please see the
references and pages posted on WWM re Nudibranchs. Bob Fenner> | 
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