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FAQs about Marine Snail Identification
8 Related Articles:
Gastropods, Sea Slugs, Mollusks, Abalone,
Related FAQs: Snail ID 1,
Snail ID 2, Snail
ID 3, Snail ID 4,
Snail ID 5, Snail ID 6,
Snail ID 7, Snail ID 9,
Snail ID 10, Snail ID 11,
Snail ID 12, Snail ID 13,
Snail ID 14, Snail ID 15,
Snail ID 16, Snail ID 17,
Snail ID 18,
Snail ID 19, Snail ID 20, &
Marine Snails 1, Marine Snails 2, Marine
Snails 3, Invertebrate ID,
Snail Behavior, Snail Selection,
Snail Compatibility, Snail Systems,
Snail Feeding, Snail Disease,
Snail Reproduction, Mollusks, Sea
Slugs, Abalone, | 
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Re: what is it? 11/15/06 Dear "crew", Ok, I'll
look up some pictures of a Stomatella. I have never heard of those, a
few more faq's on Stomatella's would be great. It does have a shell. The
little creature showed up again last night and I reached in to touch him
and there is a hard shell on his back. Shannon <Mmm, use your
search tool/s on/off WWM with the genus name... Plenty there. Bob
Fenner> Re: Re: what is it? 11/15/06 Thank
you for heading me in the right direction. After doing some more
research on a Stomatella, I am 100% sure I have a Stomatellid. However,
I am a bit concerned because the posting that lead me to this critters
name was about how they had over run a tank. Is this a problem I
should be concerned about? <Mmm, highly unlikely> Since I have
one, are there probably more that came in with the live rock. How big
will he become? <Not too large... not a problem> It seems
otherwise he will be a good cleaner for the tank and I should just let
him go about his business. Your thoughts and any other facts on
Stomatellids would be appreciated. Thank you, Shannon <Mmm,
the Net... Bob Fenner>
Bright green snail
10/26/06 Hi I have a 33 gal tank with 4 seahorses and just found
a pea sized very green snail on my plant on live rock. The shell and
body are same colour. Is it harmful to seahorses or plants? <Mmm,
highly unlikely> Thanks so much if you can help me out, I searched
the web and can't find info on it. Johanne <Welcome. Bob Fenner>
Small white snails in marine tank - 08/26/06 I am new to
your site but I see others have written about this topic but cannot
locate the answer. I have about 50 small white snails on the glass of
my 55 gal fish only tank with live rock. Size of a pinhead. Are they
harmful? How can I get rid of them? Will my starfish or other snails
eat these? Source of these pests? Thanks. Lynne <<Lynne: It's
hard to help you without a picture. However, the most common small
snails would be either Collonistas (harmless) or pyramid (parasites to
either other snails or clams) snails. Do a search and see if you can
confirm what you have. A six line wrasse will eat small snails. Best
of luck, Roy>> Goodbye Blastomussa
8/22/06 Bob, Anthony, crew: Hope you are all well. Been a
while, all has been good. But you know, rarely do we mail you when
things are currently good :). Although I have sent along some thank
you's over the last year... Anyhoo, one day, my small colony of blue
zoo's 'poof' seemed to vanish. A couple days later, my 14 head
ruby/silver Blasto colony appeared to be down to skeletal stages on
about 7 polyps and fringes of others. <Bizarre... frightening> I
scooped it out to check and something launched (not exaggerating) off
the rock, landed on another rock and did a 'I have squished myself into
a small blob and now you don't see me', so there - maneuver. <Mmmm>
Well, I did see it. And sucked it up in a baster. Now it lives in a
Tupperware. It looks like a whitish slug, about the size of a nickel,
with a somewhat darker top. Moves rather fast. Multiple sensory
tentacles (appx 4, frontal). I am trying to get a clear pic but it is
bland, small and my camera is not the best. I have researched on the
site as well as the slug forum. Nothing. Any ideas or a genus or
something to point me in the right direction? Am I looking for the
Blasto/zoo eater in the wrong place and should return the goober to the
tank? Thanks much, best to you all Bill (Tirion) <... need
more to go on... Could be a fast-moving mollusk of some sort... Perhaps
a Notaspidean... that seemed to "jump"... Please send along the pix...
Bob Fenner>
Re: Goodbye Blastomussa 8/22/06
Crew; Strike some of that. It has turned more darkish on top and I
never touched it previously (never be too careful).. However, I have
found that it has a thin shell like top but is still very
flattish. Very fast mover. Almost whelk like in speed and
movement. Mouth has no visible barbs or rasps. Still no good
pic. Thank you. <Still no good guess. Bob Fenner>
Re: Goodbye Blastomussa 8/23/06 Bob, Crew. I
might have caused a ruckus over nothing. I now believe this is a
largish Stomatella. <Ah ha!> Had never seen one this size
prior, mostly smaller in refugiums and 'dingy' with that
environment. Testing in my zoo frag tank :) <Do keep your eyes
peeled for others... Bob Fenner>
Mollusk ID...Keyhole Limpet? - 08/14/06 Hello, <<Good
Evening>> I apologize for bothering you, but I have been
searching for hours to what this creature is. <<No bother
friend>> A few hours after the aquarium lights went out I looked
at my aquarium with a flashlight and came across this odd guy.
<<Ahh...indeed many cool things to espy in our reef tanks after the
lights go out!>> It almost looks like a snail, but as I watched
it, it seemed to excrete small white particles at an interval of one
every 30 seconds from the tip. I took a few pictures, but when I
went back later it was gone. It's in a 180 gallon reef/fish tank
with 200lbs of live rock. It was pretty remarkable to watch, but
I'm concerned it may be bad news. Thank you so much for any help
and information you can provide, and for your time. <<Well
Jerry, this picture is not close enough/clear enough to be
sure...but from what I can see in the picture and your description I
believe you have a Keyhole Limpet...and a beneficial herbivore if
so. Try a Google search re and see what you think>> Your web
site has been very handy in maintaining my reef. <<A collective
effort...we're happy you find the site useful>> Sincerely,
Jerry R. Hoffman <<Regards, Eric H. Russell>> | 
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Unknown snail... 7/24/06 To the WWM Crew,
Thank you for making such a great and informative site. I
recently noticed two snails in my 55 gallon reef tank that must have
hitch-hiked their way in. I could not get a decent photograph due to
their size; about 1/8 of an inch. I became concerned with them when I
noticed things starting to disappear, and/or end up dead. I have a very
bare stock level for the take, and all my levels are at zero. There was
absolutely no reason for the deaths to occur from what I know of. So
far it was a healthy Coral Beauty, and a large Peppermint Shrimp. The
most aggressive thing in my tank that I purposely put there is my Thai
Damsel. Well, these snails looked peculiar because they had a very
large proboscis extending from the shell, which is always waving around
the tank. They have a long shells and are very intricately patterned
brown and white. The bodies of the snails are a mottled grey and cream
color. I found them on the glass near the top of the tank, and
separated them into a fish bag and left the bag in the tank. I was
worried they might be a cone snail species but still unsure. They were
not grazing algae from the glass, that I can tell. I know cone snails
are more prone to be in/on the sand bed. Are there any other snails
that have a large proboscis, that these might be? Ones that just wave
it around in search of something? Are there any good books or websites
that focus with pictures on gastropods?
Thank you for your time, and great website.
Sincerely, Brett R. <<Brett: It seems highly unlikely that
such a small snail would cause the death of a fish and shrimp. Since
you don't have a picture, here are 3 links to sites with pictures and/or
more info.
http://www.wetwebmedia.com/snailidfaqs.htm http://melevsreef.com/id/snails.html Here is a link to the
first of 3 articles on snails. http://reefkeeping.com/issues/2004-05/rs/index.php Best of
luck, Roy>>
Beneficial Gastropod? - 07/15/06 Hi Crew, <<Howdy!>>
I've a couple of snails appeared, presumably LR hitchhikers in my
reef tank that I was wondering if you could help me ID. <<Will
try>> I've had a good hunt about on this site and others,
particularly Googling for images. They don't seem to be cone snails
or tulips from what I've seen. <<Agreed>> They both have
tubes - proboscis? (similar to Nassarius snails). <<Breathing
tubes/siphons...similar to Nassarius snails>> I've not seen them
up to anything I disapprove of yet, just grazing on the glass.
<<I have these as well (breed prolifically)...seem to be quite well
behaved detritivores>> Their shells are currently less than 2 cm
long. My main concern is if these will prove reef safe or
not. Please see 2 attached images. Cheers, PR <<These
do look to be a species of Nassarius...but notice the eye stalks. I
don't recall the name, but when Anthony (Calfo) saw these in my tank
he made mention of a tiny "Conch", in fact the only conch he felt
was suitable/reef safe. But whether Nassarius or Conch, you should
have little concern over these Gastropods. Regards, EricR>> | 
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Smoking Hitchhikers 07/10/06 Hello, and thanks again for all of
your great information. <<Hello...and you're quite welcome!>> I
have used your site religiously since starting out and things are going
fine. <<Excellent>> My question regards a few hitchhikers that
have "appeared" in my tank. <<What a neat hobby this is, eh?>>
They seem to have the slime over the shell. <<...?>> Some are
black, some white. <<Hmm, could this "slime" be a fleshy
mantle?...cowries perhaps?>> I have maybe 3 or 4. My concern is if
they are a danger to my soft corals. <<Hard to say without knowing
more/seeing a picture>> I have noticed every now and then they stop
and have a smoke. They start puffing little smoke billows for about 10
puffs in a row and then it won't happen again for a while. Any ideas?
<<Is likely spawning behavior>> I'm sorry I have no photo.
Thanks so much, Jill <<While unwanted hitchhikers are a
possibility, often times these incidental organisms are harmless, with
most "cycling out" of a system in short order. I would keep watch and
enjoy the critters while you can/remove them if it becomes apparent they
are harmful. Regards EricR>>
Thrum, thrum... Don Knotts is
gone but not the incredible Mr. Limpet 7/1/06 I
have a 125 gallon reef system that has been running for about a year and
just recently I found a snail that's shell looks like an abalone but it
is only about 1/2 a dime in size. It was found around what looks like
rows of eggs. Is this creature bad? if not what is it? <Uhh, please
read here:
http://www.wetwebmedia.com/snailidfaqs.htm and the linked files
above. Bob Fenner>
Snail ID 6/17/06 Hi there, <Hi> We had a snail named
Speedy who met an unfortunate encounter with a crab this evening,
and we would like to be able to see if we can find another one as my
wife ended up being very attached to him. Can you help in
identifying what he is so we can ask the right questions? He had
both a horn and two little feelers at the front, which doesn't quite
come out with the photos. We've seen the same shells in hermit crab
tanks locally so I'm sure it's quite a common one. Thanks
Denis C. <Looks like some type of Nassarius snail. With a
Google search you may be able to narrow it down to species, but are
fairly common in the trade. Sometimes referred to as sand sifting
snails or burrowing snails.> <Chris> | 
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Mystery Marine Snail - 06/09/06 Greetings WWM Crew,
<<Morning Crystal>> First, a huge thank you goes out to each one of
you for doing what you do! <<We are pleased to assist>> Your
site has been a tremendous help for me in setting up my tank.
<<Wonderful!>> Almost every question I've had has been answered and
clarified, so I now have a deeper (though still 'shallow' in the grand
scheme of things) understanding of how things "should" work. <<And
your "understanding" will only continue to improve...just keep reading,
researching>> So, on to my question. I've cycled my new 47g tall
tank with 45 pounds of live rock, 40 pounds of live sand and decided to
start stocking by adding a very basic, small clean-up crew. I have two
scarlet reef hermits and two Nassarius distortus. Last night, one of
the snails popped up and stuck onto the glass while remaining very
still. This morning, when the lights came on, I found him still there,
but it had created this trail of yellow palm-frond looking dots. <<I
see them>> The entire work measures approx. 2" long and is very
intricate. I have no idea what it is, and I've looked over and over
your site for an answer. Google images yields no answers, and they look
nothing like Nassarius eggs. <<Agreed>> So now two questions
come to mind, the little guy looks exactly like Nassarius distortus, was
sold to me as such, and behaves as such. <<Though very difficult to
tell from the picture, but the shell of this snail looks more
narrow/elongate than the typical "Nassarius" shell. Possibly a Cerith
species>> But this is odd - so is the answer simply that I do not
actually have a Nassarius distortus and that the snail is laying eggs?
<<Would be my guess...I have seen snails get mixed/confused during
selection/shipment before>> I don't think my snails are happy enough
to do this in just three weeks, but who knows. <<Three weeks or
three hours, wouldn't make a difference to the snail as long as the
proper environmental cues were present>> I've included the best
picture of it as my camera could manage. <<Hmm, perhaps time for a
new camera <grin> >> Thank you in advance for any answers or help!
Crystal <<Thank you for writing so well. Cheers, EricR>> | 
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Mystery Marine Snail II - 06/10/06 Hello again! <<Howdy!>>
Thank you for the quick response about the eggs. <<You're quite
welcome>> Per your suggestion, I began looking at information on
Cerith snails, and the eggs certainly do look a lot more like theirs. I
included another photo of the snail coming out of the sand, and two of a
shell, sans snail (don't ask). <<Ruh Roh!>> Tell me what you
think! <<Hmm...from this angle, with the empty shell photos, it
indeed looks to be a Nassarius species. Try searching this site for a
positive ID:
http://gastropods.com/ >> Was I indeed taken for a country rube
and sold something other than Nassarius? <<Maybe not>> I
apologize for the resolution, but all my money is currently floating in
a large box of salty water in the living room and is not being thrown at
new cameras. <grin> <<Ha! A common issue>> Keep on truckin'
and thanks again! Crystal <<Always welcome, EricR>> | 
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Who is this guy in my reef aquarium 4/12/06 Greetings from
Portugal. <Hello Pedro> Can you please tell me who is this guy
in my reef aquarium? <Wish I could... very nice photos...
distinctive... has a shell like a gastropod mollusk... an Ovulid?...>
He's little, about half inch (+- 1cm), and when he feels in danger a
white liquid comes out from he's shell (fig. 3). <Likely
reproductive products and no problem> I'm afraid about this white
liquid and the toxins on it since my shrimps don't like it and run away
every time this happens. <Mmm...> Best regards (sorry about my
bad English), Pedro Azevedo <Your English is perfect. Am going
to show these images about and see if someone can identify this
organism. Thank you for sending this along. Bob Fenner> |
MOLLUSK - OVULID? Dear Bob, Hope all is well with
you guys. I'm sure you've been off and about - any interesting
shell finds while as of recent? <I do have some shells to show
you...> Sorry for the delay in getting back to you re the
requested shell i.d. I was over in the P.I. & Thailand until early
this month & it's been a crazy rush since my return. Hunting for
new employees, and still dealing with our conflict of business
interest situation re our ex-sales manager! My only comment -
stay away from legal schist if at all possible - I don't have one
(comment) re Workman's Comp.!!!! <Heee! Well I know...>
Anyway, if the little orangish gastropod is from the Med., and
indeed an Ovulid (an Ovulid should have cephalic tentacles - not to
mention eyes?), then it most closely resembles (without examining it
firsthand) Simnia nicaeensis Risso 1826. <Ahh!, thank you Marty>
If the fellow really is determined to find out what it is -
see if he knows origin/locality, I'll then see if John can i.d. -
he's better on general misc. Gastropoda by far! As a parting
thought - if it is an Ovulid - it shouldn't last very long
without its host! <Agreed> Regards, Marty <Hope to
see you soon. Hello to Angela, Harry, John... Bob F> Marty Beals
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