FAQs on Chitons 1
Related Articles: Chitons, Mollusks, Sea Slugs,
Related FAQs: Chitons 2,
& FAQs on: Chiton Identification,
Chiton Behavior, Chiton Compatibility, Chiton Selection, Chiton Systems, Chiton Feeding, Chiton Disease, Chiton Reproduction & Mollusks, Sea
Slugs, Sea Slugs,
Marine Snails 1, Marine Snails 2, Marine Snails 3,
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Hitchhiker ID: Polyplacophoran/Chiton - 10/10/07 Greetings
WWM Crew! <Greetings, and good morning to you as well!> I
dug through the hitchhiker ID's in the FAQ and didn't
come across this one (maybe I just missed him?). Pic is attached,
came in with a colony of Zo's - he's a pretty mean
looking guy, fuzzy with spikes running down his back. <It does
look a bit intimidating, doesn't it? Heeee.. you can name
him/her Spike! The good news is that this is a neat little
Polyplacophoran, or Chiton. They're herbivores/mostly algae
grazers, reef safe, and nocturnal. I'd be curious to find out
where this little guy arrived from, as it looks very similar to
the species Cryptoplax striata (see this link for comparison:
http://fjas.nl/cryptoplstriata.htm ). Additional general
information here: http://www.wetwebmedia.com/mollusca1.htm
http://www.wetwebmedia.com/chitonfaqs.htm I have one last link
for you because it's just too great not to share. It's a
species list with some terrific images of live Chitons:
http://fjas.nl/livingpolyplacophora.htm . Enjoy your new
addition!> Thanks! <You're very welcome! -Lynn> Dave
Hitchhiker ID: Polyplacophoran/Chiton Follow-up -
10/10/07 <Hi Dave!> Thanks Lynn <My pleasure> -
the one in that first link you sent looks just like him.
<Excellent. That's a pretty little Chiton.> Spike has
been moved to a happy new home in our 150 gallon live-rock sump -
it's a lit sump, so lots of algae to graze on. <Good to
hear. Chitons graze on hard surfaces, so it sounds like he'll
be fixed up.> He came with some Zo's from Fosters and
Smith, no idea where they originated. <LOL Yep, no telling.
Those Zo's could have been in a holding tank with specimens
from all over the world. At any rate, it sounds like Spike's
got a nice new home!> Cheers,
Dave
<Glad I could help. Take care - Lynn>
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Cryptoplax, Chiton ID, aquarist
input/help 9/25/07 Hi, <Enrico> Do not
know, if you meanwhile solved the identification of the Cryptoplax you
found from a tank. The species is Cryptoplax burrowi. Compile a
distribution database for Chiton species, so would be interested if you
could provide detailed data, and if you came across other species.
<Mmm, what little WWM has re Polyplacophorans is posted here:
http://www.wetwebmedia.com/chitonfaqs.htm> Cheers, Enrico <Danke,
Bob Fenner> -- Enrico Schwabe Zoological State Collection Munich
(ZSM) Dep. Mollusca Muenchhausenstrasse 21 D-81247 Muenchen Germany
field of work: world-wide Polyplacophora (main focus Indo-Pacific)
http://www.zsm.mwn.de http://www.worldwideconchology.com/BaliChitons.html
Chiton Pix 9/12/07 Good
afternoon, <Now early morning.> I know you guys like
pictures. <Yep... I like to take'em too!> So how about
some of my Chiton buddies? They're really cool. My invert-guru
friend says that these ones are probably intertidal and that's
why they're not afraid to craw in and out of the tank.
<Heehee! Cool pics. These guys would likely become kitty toys in
my house!> Sara M.
<Hey... aren't you part of the crew? ;) Mich> |
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Chiton... 7/31/07 Hi guys... <Hi Jo,
Mich here.> Can you please tell me if this guy is a
Chiton...he's around 2inches long and flattish...there's
plenty of pics around of the shell side of these critters, but none
showing the mouth etc...I took him out of my tank just in case he
was a baddie, but if he's a goodie, he can return... <Does
look like a Chiton to me. More pics here:
http://www.wetwebmedia.com/chitonfaqs.htm or do a Google image
search using "Chiton" and "ventral".>
Thanking you...
<Welcome... Mich>
JO... |
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Chiton, and possible quarantine
5/27/07 <Hello Kent, Mich with you today.> I live in
Australia, on the east coast, <Lucky you! I live in the
USA, on the east coast.> and today happened upon a nice piece of
dead coral. Thinking I could use it in my tank I will soon
be setting up, I took it home and put it in my QT.
<Starting the right way! Good for you and all the future
creatures in your care!> Well, now I have a 2-inch Chiton crawling
around in the QT, and I was wondering if there would be a problem with
introducing it into my existing tank. <No, not likely to
be a problem.> I am worried about disease being introduced, but have
not seen anything on this using your site. <I am unaware
of Chitons posing much threat as a vector for disease.> Would this
be a good idea to put it straight in? <I would keep it
in your QT tank for now.> Thanks for any advice you can give me,
really enjoy your site. <Welcome and glad you like the
site! Mich> Kent
Name that Invert :) ...In six notes
or less: Chiton 5/23/07 Hi Crew
<Hi Jackie, Mich here!> I was hoping you could help me
identify this invert that I purchased. <Better to
ID first then purchase.> I am very new to reef keeping and
have been researching every animal that I have. This
one, I cannot find anywhere. It seems kind of like an
abalone in that it has 4 small holes on top of its back. <Hmm,
Chitons typically have eight.> However, it does
not have a shell. More like a leathery smooth
back. I am enclosing a pic, but I apologize it
isn't very good. This is what I have
observed. It is nocturnal. It is grayish,
brownish, green colored with dark brown stripes around it on the
fringe/feathery area (cerata?) below the mantle but above the
foot. Its shape is oblong with perhaps a bit of a
point on its rear end. It has two rhinophores
(striated bulbs I think). It spends almost all of its
time on the live rock, but sometimes ventures to the glass, stays
low in the tank anyway. I have not seen it on the
substrate ever. It can retract its head into its
mantle - when it is resting or frightened it pulls itself into
the mantle and appears more circular/oval in shape. It
can be somewhat flat (1/8th inch perhaps), but have noted a few
instances where the foot/ underside seems to almost inflate such
that it doubles in width. I have trouble thinking it
is a Nudibranch since all that I have seen suggest they are quite
colorful - this invert is almost hard to see when it's on the
rocks. It doesn't seem to have a shell even though
its top is smooth and seems thickish. Nothing else in
the tank bothers it. For the longest time it seemed to
spend all its day time resting in the crevice/cave that my Daum
reef lobster hangs out in during the day - oddly,
since the lobster is very possessive of it's lair and nothing
else seems to be able to even approach it without getting snapped
at. It seems to feed off the rocks/glass and I have
not seen it bother any snails or my crab or clowns. It
rests upside down almost exclusively. It is about two
inches long and about half inch across, eighth inch width I
guess. So I hope this helps you to help me find out
what this creature is. <I believe you have a
Chiton, though a limpet might also be a possibility, but I'm
leaning toward a Chiton. More here: http://www.wetwebmedia.com/chitonfaqs.htm
> What is its diet? <Chitons are
herbivores.> Where does it come from? <Chitons are found in
all seas.> I tried to find out more from where I got it at the
pet store but I am now doubtful of the knowledge of the staff
there since they also sold me a sand sifting tiger star and I
have neither the substrate depth or tank size to sustain it (I am
going to try to exchange it). <It is always best
to do your own research before making any
purchases. Unfortunately, sand sifting stars typically
starve to death in captivity.> My tank is 20
gallons. I have about 10 pounds live
rock. Aragonite substrate about 1.5
inches. Rio Nano Protein Skimmer. Aquaclear
hang on filter with foam and carbon inserts. Elite
hush hang on filter with BioMax in place of
cartridge. T5 Glo Daylight and Actinic
lighting. Tank occupants are Red Mithrax Emerald Crab,
Green Bubble Tip Anemone, <Mmm, I personally am not a big
anemone fan. They like to go for walks at the most
inopportune time, which can spell disaster, especially in such a
small system.> Daum's Reef Lobster (purple), <Should be
in a larger tank, closer to 50 gallons.> Two false Percula,
Sand Sifting Star, 3 Star Snails and one bumble bee snail that is
currently missing in action. Water parameters are all
good. <Vague.> Using RO. <Good.> Salinity
is 1.026. Temp is 80. Thanks for your help.
<Welcome! Please do get in the habit of researching
prior to purchasing. Mich> Jackie
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Re: Name that Invert :) ...In six notes or
less: Chiton 5/24/07 Hi Mitch <Hi
Jackie, Mich with you again.> Thank you for your prompt
reply. <Welcome!> Please know that I have
definitely learned a lot of (hard) lessons since setting up my reef
one month ago. Rest assured that I will never purchase
another animal for the tank that I haven't researched in
full. <Glad to hear!> I was just taking the
advice of the LFS staff who just said yes or no to compatibility
when I pointed to stuff in their show tanks. The
learning curve to marine tanks is steep. <Yes, there
is always something more to learn.> This site has been a
plethora of info for me. <And everyone else!> I agree that
the invert is likely a Chiton. <OK.> The thing
that bothered me about giving it that classification is that I
could not see eight holes on top and it does not have identifiable
plates. <Some look fleshy or leathery.> In fact
last night I think I saw more like what looked like a whorly type
of lineage on its mantle top. <Possible.> It was
on the front glass last night and I saw the bottom is very smooth
and very much like a Chiton. It has a fairly large
orifice for a mouth, with what looks like a red radula? <OK.>
Thanks for your help. <Welcome!> Water parameter
last nights test Nitrates and Ammonia are somewhat elevated at 5.0
and 0.25 respectively <Zero for both is optimal.> (I think
since I have been overfeeding in fear that the sand sifting star
will die before I can take it back) <Shouldn't starvation is
typically a slow death.> Nitrites 0.00 and pH
8.2. Temp 80. Salinity 1.025 Have
a bit of brown algae still and some of it is a bit like
hair. Substrate these days looks a bit littered with
rusty patches? <Nuisance algae, Likely
Cyano/BGA.> I feed HBH Flake Frenzy for the two false percula
and HBH Super Soft (about 5 pellets a day). Every other
day I give a quarter square of frozen Mysis shrimp. (Which I try to
squirt with a baster around the bubble tip) Too
much? <Does sound like a hefty amount for a twenty
gallon tank.> The clowns always look hungry. <My cats always
look hungry too, and will eat to the point of vomiting if
allowed.> A few other questions - I have the Master Saltwater
Test kit, which tests nitrates, nitrites, ammonia and
ph. What other tests should I purchase? <Likely
Calcium and Phosphate. Would consider other brand names
as well... more here: http://www.wetwebmedia.com/mtestbrands.htm
> Since I am now using RO water exclusively, what kind of
buffers do I need or do I? <pH/Alkalinity, Calcium more here and
related links in blue: http://www.wetwebmedia.com/marphalk.htm
http://www.wetwebmedia.com/alkalinity.htm
http://www.wetwebmedia.com/caalkadds.htm
> Thanks again! <Welcome again!> Happy fish
keeping.
<And to you! Mich>
Jackie |
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Strange Critter ID Please: Chiton
5/10/07 Hello there! <Hi Jo, Mich here!> I
know that you guys are really busy but I was hoping you might be
able to help me ID this critter. <Certainly will try!> We are
currently setting up our second reef tank. The LR is from Indonesia
as far as I know and this "thing" has showed up twice
now, both times at night with all lights off. It seems quite shy
and retracts slowly back in its hole as soon as the room light is
put on. I find watching the LR and the critters on it
one of the best things in this hobby. <Heee! Yes, I
would agree. One of my favorite parts
too! When I was setting up my tank most people just
didn't understand when I would tell them how excited I was
watching all the life emerge from the LR. I would get
comments, with undertones questioning my sanity: "So
you've spent the last hour staring at rocks?" > We had
new forms of life coming up in our 2.5 years old reef right up to
the end and managed to ID most of them but this is really unusual.
Any thoughts? It is flesh colour and I thought it was some sort of
bivalve but it seems quite soft, a bit like an anemone. <Looks
like a Chiton to me. They are reef safe and generally
graze on algae. A lucky addition! Do enjoy
it!> Many thanks for your time and looking forward to hearing
from you soon <Welcome! Mich>
Best regards,
Jo Vasey |
Re: strange critter ID please photo now added,
Chiton 5/12/07 Hi Mich and thanks for
the quick reply! <Hi Jo! You are quite welcome.>
Are Chitons what some call "Stomatellas" (please forgive
me if I've spelled this wrong)? <No, they are two different
critters and your photo is not a picture of a Stomatella snail.>
I did a search on Google but the critter doesn't look much like
the search returned on Chiton - the main difference being the lack
of a shell on his back. <Many different species, not all have
the "classic" Chiton look.> The 2 black holes/openings
look a little bit like craters? <I think you will find there are
more than two "holes", there are likely 8
"holes" or eight linearly arranged overlapping
articulating plates, which make up the shell on his back.> Any
more thoughts? <Nope, I still think it is a
Chiton. Please see similar photos here:
http://www.wetwebmedia.com/invertidfaqs.htm Chiton ID
9/9/03 and here: http://www.wetwebmedia.com/snailidfaq3.htm Prehistoric
worm...errr...??????? 1/30/04> I think I saw it last night quite
longer and stretched inside the rock which is very porous and you
can see through but could be wrong. <Likely so, they do tend to
stay in the same location emerging typically at night to
feed. The behavior you described in your prior email is
also consistent with a Chiton.> It is really bugging me now. My
LFS is kindly looking after my livestock during house move and
upgrading the tank. We are getting our corals back soon - I am
trying to decide if I should remove the piece of rock with the
critter to the sump where it won't be tempted to munch on
anything? <Most are harmless algae eaters. If it were
me/mine, I would not be concerned.> Many thanks again and
looking forward to hearing from you again! <You're
welcome! Hope this gives you more confidence in the
ID. Mich> Best regards
Jo |
Re: strange critter ID please photo now added...
Polyplacophoran 5/12/07 Hi Mich, <Hello again
Jo!> Thanks for the links. <You're welcome!> Yes, it
looks very much like the one in the first link and thanks God
it's not 6" (yet!) like the one in the second link.
<Heee!> Thank you for helping me ID it, I didn't mean to
doubt you but my not very in depth search on Google returned
completely different images. <I can appreciate and
understand. And just found another photo
here: http://www.wetwebmedia.com/invertid24.htm Can you
identify 3/16/2007 > As for the 8 "holes" I
did think that there might be more than 2 but couldn't see
properly as it wouldn't come out of the rock enough to see
properly. <Yes, Chitons can be quite shy.> I will continue to
observe it and will try to learn a bit more about its feeding
habits. <Excellent!> Many thanks again! <You're quite
welcome! A pleasure to assist! Mich>
Jo |
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Look's like a Chiton - about 6 inches...
images an order of magnitude too large... PLEASE> FOLLOW
DIRECTIONS!!! - 2/26/07 I own a copy of your book as it
saved me when I first got my tank from making a lot of
mistakes. I have elevated my knowledge in the last year
alone and added two more tanks to my system and have used some GARF
products to help to boost my tanks performance. <Brad,
you've crashed our server...> We had a power outage for over
24 hours and I kept as many of my fish alive as
possible. In the end I lost two including a black clown
that was being eaten by a crab in the picture. I usually
would not let the crab eat a fish, but I wanted him to leave the
sluggish tired fish alone in the tank as my batteries had run out
and a generator was still hours away. I found this critter doing a
hot lap past the crab and clown that appeared to be a
Chiton. I was curious though as it changed color to a
darker brown and kind of green one subsection at a time right as it
approached the crab eating the fish. I watched in
anticipation, but in the end it just kept scooting on out of
site. I have never seen this guy before and he is fairly
substantial in size. I took 32 pictures of this guy,
these are some of the clearer ones since I was shooting through the
gals of the tank. I didn't want to take him out
since he appeared harmless to my tank inhabitants. That
is until proven guilty as I have been removing Zoos from this tank
since they were not fairing well for some reason? Let me know what
you think,
Brad
<Is a Chiton. Bob Fenner> |
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Invert Ident: Woodlouse on Land = <Actually
doesn't equal> Chiton by Sea. 1/31/07 Hi Crew
<Hello Darren, Mich with you today.> First time questioner and
marine newbie! <Welcome to our salty world!> When re-arranging
some rock in my recently set up 42 gal, I noticed a strange creature -
about 1/4 - 1/2 inch long, pale coloured with a yellowish end, slow
moving and segmented like (and reminiscent of) a woodlouse, although
with no visible appendages. <Hmm, very interesting. I
have never heard of a woodlouse. I did a search and now I
can ID your critter. I had no idea there was something so
similar on both land and sea. What a
world! You've got to love it! What you have
is a Chiton. For more info, please read
here: http://en.wikipedia.org/wiki/Chiton >
Worth worrying about, or just another example of nature's diversity
imported on live rock! Just another example of nature's incredible
diversity, a fine reef safe addition. Lucky you! Thanks and
keep up the sterling work! <You are quite welcome! Thanks
for teaching me something new today and for reminding me just how
amazing life is on our planet! -Mich> Darren
Unknown
creature... Chitons in Cozumel 1/30/07 <Hi Tracy,
Mich with you today.> While vacationing in Cozumel Mexico we saw
these strange creatures attached to the rocks by the
water. My Uncle is quite curious as we all are what they are
and the back ground on them, if you could help me. <These are
Chitons... living fossils. You can find more
here: http://en.wikipedia.org/wiki/Chiton > Thank You,
<You're welcome. -Mich>
Tracy McCullin
Source for Chitons? 12/1/05 I've search
through your site and many others looking for a possible source for
purchasing a Chiton. I've been fascinated by them since
tide-pooling in a marine inverts class several years back (more than
several actually). Any hope that you know of a source for these
neat creatures? Other than hoping to get one hitching a ride on live
rock. <Other than a hitchhiker, I know of no source. I'm
sure one can be special ordered from a LFS. Dealers don't stock
inverts like this because there isn't a demand for them. James
(Salty Dog)> <<Maybe GARF, or another supplier if
"clean-up" crews, perhaps? Marina>>
Chitons in the Reef Tank. Hello Kind Sirs, It's been
quite a while since I sought your advice; for the most part things
have been going very good. Low and behold last night I notice
a new inhabitant slowly crawling on my live rock. This little
beastie is about 1.5 inches long with what appears to be a flexible
segmented center shell surrounded by the white and purple mantle.
The tank has been up and running for a couple of years the live
rock was from Walt Smith and has been in there for well over a
year. Soft Corals, cucumber, starfish shrimp and fish all doing
fine so I don't think he's doing any damage??? I've
been an avid reader of your website for quite a while and I
don't think I ever seen anything quite like this guy. He does
look pretty cool and I'm guessing some kind of Chiton. Any idea
if he's a good neighbor or should he be banished. Chuck
>>>Hello Chuck! I just love those Chitons, one of my
favorite marine inverts. I think it's all the time I've
spent tidepooling over the years and finding those little guys.
Anyway, no worries. They are algae/surface film grazers for the
most part, and not a threat to your other inverts. You're quite
lucky to have such a large individual, as most hitchhiking Chitons
are quite small. I have several small specimens in my tank
currently. Cheers
Jim<<< |
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Chiton Questions 3/26/04 Hello Bob, I am a member at Reef
Aquarium Guide and I am trying to find information if there is possible
a bad hitchhiker Chiton that can arrive on live rock. <hmm...
Chitons are overall very very "reef safe" as algae grazers.
Limpets are often confused with Chitons and can be predatory no reef
animals. Are you sure it is a Chiton?> I have a 125 gallon reef . I
watched as my post prized zoanthids disappeared over a few days time.
The rock is mostly covered in coralline except where the polyps
were at. I noticed a bright pink to purplish bumpy spot on
the rock. I watched the rock for several days and the Chiton finally
moved. I took the rock out immediately and took the Chiton off. <yes
perhaps> I had 2 huge rock with polyps disappear in 2 days time. The
Chiton was the only thing on the rocks. Any info you can give me would
be great. Vicki <without a picture of the animal,
there is not way for me to be able to ID/confirm. There are many
possible predators on your zoanthids. Do keep an eye out for
Prosobranch snails instead of your suspect polyplacophorid.
Anthony>
Help with identification Hi, I'm trying
to figure out what this is. I found it my reef tank last
night. I showed the photo to my LFS and they told me it
could be a Chiton, Cryptoplax or Stenoplax. I've
looked hard doing google searches to find exactly what it is to no
avail. Do you think it is reef
safe? >From what I can tell so far it grazes on
algae. Thanks in advance, ART KOUNS <It is definitely a Chiton
of some species... and reef safe enough (an algae eater. Bob
Fenner> |
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Re: Help with identification thanks, it
narrows it down slightly. at least i appears to be reef
safe. it's kind of funny this was the first time
I've seen it being that my tank has been going for 2 years.
<Amazing, but happens "all the time"... and testimony
to your consistent good care. Bob Fenner> |
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