FAQs about Non-Vertebrate Animal
Compatibility/Control
Related Articles: Marine Invertebrates, Marine Invertebrate identification,
Marine Invertebrate Selection,
Marine Invertebrate Systems,
Marine Invertebrate Disease,
Marine Invertebrate
Reproduction, Quarantine of Corals and
Invertebrates, Feeding
Reef Invertebrates, Lighting
Marine Invertebrates, Water Flow, How Much
is Enough,
Related FAQs: Marine
Invert.s 1, Marine Invert.s 2,
Marine Invert.s 3, Marine Plankton,
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Hyper-Salinity For Ridding Live Rock Of
Unwanted Guests -- 07/21/11
Hi Bob,
<James>
Something here you may or may not want to post. I have seen on a couple
of sites where the etailer suggests that you use hyper-salinity to rid
live rock of unwanted guests by placing the rock in a pail of saltwater
mixed to 1.035-040. I can't help but wonder how the hyper-saline
water can tell the difference between unwanted and wanted
hitchhikers.
<Can't>
Putting organisms in something that is almost twice as salty as
seawater will likely kill or stress out wanted organisms. You may be
able to chase out that dreaded Mantis Shrimp or Bristleworm but you
will also be harming or killing wanted animals. It's like the old
saying, "throwing the baby out with the bath water". In my
experience, most live rock doesn't have unwanted guests due to the
long transit time where the rock is completely out of water. James
<Will post/share. B>
re: Hyper-Salinity For Ridding Live Rock Of Unwanted
Guests
Thank you!
J
<Thank you. B>
Invertebrates? Sys./comp.
02/08/09 Hi WWM, Great Site. My wife thinks I spend too much
time on it though. <Hehe... too much time? Never!> Despite that,
I still have a question that I couldn't already find an answer to.
I've had several successful marine tanks over the last 15 years,
but no experience with reefs. I currently have a FOWLR tank that
includes a Picasso trigger, emperor angel, lunar wrasse, 3 Bannerfish,
and 4 false Percs. Lighting is 3 rows of 'old school'
fluorescent bulbs (1 actinic spectrum) and water circulation is
moderate. My question is, are there any invertebrates, or groups of
invertebrates, that would survive under these conditions? <Hmm...
the angel and the puffer are likely to pick/nibble on just about any
coral you try to keep. But if you don't mind taking the risk, you
might try a leather coral. They can adapt to low light, are low
maintenance and usually grow fast. I would still strongly suggest you
upgrade your lighting though... at least to compacts or VHOs. Cheers,
Sara M.>
Trigger/Angel-"safe" inverts
10/7/08 Hi, crew, I always come across questions such as
"which triggers are reef-safe?" or "which angels are
reef-safe?". <Neither really; while some species may work
successfully in some tanks, both families evolved to eat invertebrates,
so at least some of the things in your tank are at risk of becoming
food.> I'll have an 8 foot x 2.5 x 2.5 foot tank, and am really
interested in a Clown Trigger and an Emperor Angel. If I can't have
both in this 375g tank, then at least the Imperator. <Clown Triggers
are comparatively aggressive fish, and I don't really recommend any
triggerfish outside one or two genera (Sufflamen, Melichthys) being
kept in community settings. Does of course depend on the specimen.
Emperor Angels can of course be kept in multi-species tanks, with the
proviso that (as ever with Pomacanthidae) that they're "top
dog".> So, my question is, what inverts/corals are most
probably trigger or angel-safe? <Angels specifically go for sponges,
so that's the main group to avoid; that isn't to say they
won't have a go at other types of invertebrate, but provided they
are well fed, and the tank is sufficiently large, any damage tends to
be minimal. With triggers, shrimps, molluscs, annelids and echinoderms
are all easy meat. Some triggers ignore cnidarians (corals, anemones,
etc.) but many don't, and the Clown Trigger is one that will
damage, likely consume, such animals given the chance.> The FOWLR
does not appeal very much to me, and if I can't have inverts, then
it will be a pure reef tank with reef-safe fishes only. <Would
HIGHLY recommend that approach, perhaps building up experience of this
aspect of the hobby generally before thinking about either a trigger or
the Emperor angelfish. Do remember the Emperor angelfish has a poor
survival record, in part because less experienced hobbyists are
attracted to this animal without fully comprehending the demands it
places on its keeper. There are many easier to maintain angels out
there.> However, if I can have an Imperator as my
"showcase" animal, and still have a reef, then that would be
great. <Suspect it would be worth doing a bit more reading before
anything else...> Thanks for any recommendations! <Cheers,
Neale.>
Possible sea cucumber problem 6/18/08 Hello,
<Hello, Jack!> I've searched and searched, and cannot
find any specific answers, so out of desperation I'm asking
my very first question! <Sounds good. Thanks for
searching!> In one of my labs, I've got a 4 month old,
75gal marine tank (w ~20gal sump) which...until this
morning...held only a cleaning crew (snails, hermits, and two
peppermint shrimp), live sand, live rock and gobs of green algae.
I just received two "Marine Invertebrate" sets and some
jellyfish from Ward's Scientific, <mm...yes> and within
an hour of introducing the various species (I know, too many at a
time, but it's the only tank we've got...I still need to
get a quarantine tank going) BOTH peppermint shrimp were in the
open, on their sides, twitching. They died about 2 hours later.
http://wardsci.com/product.asp_Q_pn_E_IG0013628_A_name_E_Invertebrate+Living+Specimen+Set+1
http://wardsci.com/product.asp_Q_pn_E_IG0013629_A_name_E_Invertebrate+Living+Specimen+Set+2
http://wardsci.com/product.asp_Q_pn_E_IG0013404_A_name_E_Jellyfish+Living+Specimen
I took great care to minimize introducing very much foreign water
to the tank. <Okay. How did you acclimate them? Did you slowly
transition the water in the bags to system water, or did you just
release these organisms into the tank? Simply dropping them in
would most likely kill them promptly.> Especially, from the
sea cucumber bag! I called Ward's, and they could only tell
me that the genus/species was "Cucumaria".
<Generic...> Nevertheless, I suspect the Cuke got freaked
out in transit and spewed some toxins upon arrival. <Much more
a predation response than environmental> Are there any other
possible explanations, given the long list of newly introduced
critters (check the ward's links, above)? <Be advised that
the animals sold by Ward are not compatible with each other, and
are rarely properly identified by the company. In my experience
with these sets the instructions for care are poor, and the
animals sick or doomed upon arrival. The jellyfish, for example,
are completely unsuitable tankmates for the other offered
specimens, and will require special aquaria to house them. Most
of the echinoderms sold by Ward simply cannot be kept without
intensive feeding and water change regimens- not what a zoology
or invert. phys. class needs!> I've done a partial water
change. What other precautions should I take? <I would test
your water parameters and see if something is seriously out of
whack, and review acclimation procedures. Perhaps consider paying
a bit more for some select, research specimens from another
source.> I promise, to never introduce so many animals to the
tank, ever again. Thank you! <No problem.> -Jack
<Benjamin>
Re: Possible sea cucumber problem - 6/18/08 Thanks for
the prompt response. I've had a few hours to further research
the situation, here's an update: 1. Acclimation occurred over
the entire morning yesterday: a) each bag was floated for 1 hour;
followed by b) adding tank water to the bag (1 pt tank : 2 pts
bag volume) and another hour of floating; followed by c) emptying
1/2 of that water (into sink), topping off w tank water, and
floating for another 1/2 hour; and finally d) adding critter to
tank while minimizing the introduction of baggy water. Snails and
hermit crab were rinsed under tapwater too. <If anything, this
might have been too long, but since you had them floating
temperature shouldn't have been a problem. I doubt
acclimation was the problem.> 2. Nobody else was dead this
morning. Yay! <Glad to hear it!> 3. I no longer attribute
the shrimps' demise to the cucumber. A more likely suspect
would be the jelly's. They'd shed lots of slime
(nematocysts?) in transit, and 2 out of 3 had actually LOST THEIR
MANUBRIA...incidentally, the injured jelly's and detached
mouth-pieces are still pulsating on the tank's floor. I now
hypothesize that the shrimp were knocked off by free-floating
nematocysts. <Very possible! Cnidarians can shed a lot of
stinging cells under stress.> 4. I consider the
Cassiopeia's doomed if they remain in this tank, and a hazard
to whatever strolls past them. <Both correct.> I'm
setting up a temporary 10gal w/ steep live sand "banks"
on either end, and setting up a weak submersible filter on the
bottom to create a pseudo-circular, vertical current. I've
got some high-power full-spectrum fluorescents (used on lizards)
I can put on a timer, too. Meanwhile, I'll see if anyone
around here wants em (LFS, Bio dept, aquarium...) and, worse case
scenario, I'll preserve them for our teaching collection (I
waste NOTHING around here!). <Sounds like a good plan.> 5.
More research has me concerned about the Featherdusters and
predation from: red and blue-legged hermits, brittle star, and
the urchin. Real, or paranoia? Time will tell... <There is
certainly risk, but they should be fine. Hermit crabs will eat
just about anything, given the chance, but as long as there is
easier food to be found, they probably won't be going after
something the have to catch.> The determining factors in
choosing Ward's over the LFS: very good prices (surprising,
actually), guaranteed delivery, a 20% off coupon and an
established tax-exempt account. <Understood.> The lack of
documentation was acceptable, since I'm quite capable of
researching various problems, <Clearly. You definitely did
your homework before you wrote this reply!> but I'm
ashamed to have assumed that their sets were compatible...and to
have created this Darwinian situation. <Selective pressure
notwithstanding, compatibility and mortality are perpetual
problems in aquaria. I wouldn't lose too much sleep over your
assumption- it is reasonable to expect that sets of specimens
from a reputable supply company would be compatible...that said,
often time accuracy is sacrificed to Mammon in this hobby.> I
should have known better, given that they included Aiptasia
anemones in one set! <Probably helps keep the price
down...and, given they aren't overfed they can be
fascinating. You might be interested in information re aiptasia
culturing/filtering...use of aiptasia to clean water.> Best
regards, -Jack <The same! Benjamin>
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Parasitic echinoderms, actually other select
phyla 2/22/07 Dear Mr. Fenner, <Michael> I just
finished your article titled "Spiny-skinned animals, phylum
Echinodermata"**. I doubt your statement that
echinoderms "...are the only phylum with no known parasitic
members, though they are often hosts themselves." <Mmm, this
stmt. should be modified, pre-affixed with "Of the common phyla
seen/used in ornamental aquariums,..."> I do not
know of any parasitic species in a number of phyla, including
ctenophores, Sipunculids, echiurans and chaetognaths.
<Amongst how many current animal phyla?> Do you know of any
references regarding parasitic species in these phyla? Sincerely, Dr.
Michael Baltzley -- Michael Baltzley, Ph.D. Postdoctoral Fellow
Division of Biological Sciences University of California, San Diego
<Tried the quick look/see on the Net re comb jellies "as"
parasites... dismal... Am a local San Diegan, and even UC alumnus...
and do make it down to the S.I.O. library (one of 19 I believe on the
SD campuses)... and will take your question with me when I have
opportunity to use their Zool. Abstracts, BIOSIS, et al. computer
search bibliographic tools. Cheers, Bob Fenner>
Re: parasitic echinoderms 2/24/07 Dear
Mr. Fenner, <<Just Bob, Michael>> Thanks for your response.
<Amongst how many current animal phyla?> There are currently
about 35 animal phyla. I say 'about' because
invertebrate taxonomy is always being revised and
modified. Wikipedia has a reference page listing the current
animal phyla ( http://en.wikipedia.org/wiki/Phylum). I would not
assume that the Wikipedia entry is all-inclusive or completely
accurate, but it is a good summary page. <<Ahh, thank you for
this>> <Tried the quick look/see on the Net re comb jellies
"as" parasites... dismal... Am a local San Diegan, and even
UC alumnus... and do make it down to the S.I.O. library (one of 19 I
believe on the SD campuses)... and will take your question with me when
I have opportunity to use their Zool. Abstracts, BIOSIS, et al.
computer search bibliographic tools. Cheers, Bob Fenner> I did a
quick search for parasitic members in the phyla I mentioned
previously--echiurans, Sipunculids, ctenophores and chaetognaths--in
ISI Science Citation Index and didn't find anything. I
would be very interested if your search turns up anything. Thanks, Mike
<I "know" of no parasitic members in these other phyla as
well... as previously stated, I should have prefaced the bold statement
with "amongst" the few phyla common to aquarists... But will
do a bit of searching and write back to you. Bob Fenner>
Starfish and
Hydroids? Blue Linckia (Linckia laevigata) Better Left
in the Sea. 2/7/07 Hi WWM! <Hi Travis! Mich
here!> I was thinking about adding a blue Linckia star to my 80
gallon reef tank, but after researching some of the LR hitchhikers
I think I have, I'm not sure if it's a good idea....
<No. It is not a good idea, but not for the reason
you suggest. The natural and necessary diet of these
beautiful Blue linckia (Linckia laevigata) is
unknown. Though the will accept meaty foods, they seldom
live more than 18 months in captivity and appear to die from
malnutrition. If you purchase this creature you are
likely dooming it to an early death.> What I
thought was an abundance of mini-dusters of my LR may actually be
an infestation of "colonial hydroids" in stationary/tube
form! <Could be.> Would a Linckia star (or any starfish for
that matter) be damaged/irritated by crawling over rocks covered in
hydroids? <Possibly, but not really this issue here my
friend.> Thank you, <Welcome! -Mich> Travis.
Attached is a pic--I don't have a good macro/close-up setting
on my digicam--but you can sort of see the hydroids on the LR on
each side of the mushrooms. <Blurry! but I
see.> |
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Addition of New Invertebrates Hello, <Hi there> I have
a relatively new (approx 6 mo.s old) 120 gallon marine aquarium. I have
a few fish (2 fire fish, 2 Percula clowns, and a royal Gramma, ), 3
anemones (2 long tentacle and a magnifica anemone), a banded coral
shrimp, a fan worm, several small blue legged hermit crabs, and a
cleaner shrimp. (Sorry for the invoice list) I really enjoy the inverts
as much as the fish. I plan on adding some new fish over the next few
months but I really want to add more inverts. My question is what other
inverts can I add before I run into incompatibility issues? <The
list is long> I would like to add a blood shrimp and maybe a arrow
crab. <The Lysmata should be fine, I would not place an Arrow Crab
here> Is there a problem with so many different types of inverts in
the tank? <Possibly, yes> The new fish I would like to add is a
yellow tang and/or a Naso Tang. Do you have any tricks on getting them
to eat? I know they are veggies and I have been told they like seaweed,
but the real trick is getting them to start to eat. Any
suggestions?
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