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FAQs on the Ctenophorans, Scyphozoans and Hydrozoans called
Jellyfishes 2 Related
Articles: Jellyfishes, Scyphozoans,
Hydrozoan Jellies, Hydrozoans,
Cnidarians, Related FAQs: Jellies
1, Jelly Identification,
Jelly Behavior, Jelly Compatibility,
Jelly Selection, Jelly Systems,
Jelly Feeding, Jelly Disease,
Jelly Reproduction, | 
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Scyphozoa Question 6/16/08
Hi,
<Greg>
I have discovered
that I have what appears to be several jellyfish (Scyphozoans) in an
aquarium I use for experiments.
<I saw a bunch of settled
Ctenophores in shops this last wknd. in Phoenix. Okay, your turn>
The system (less than 1 gallon) is unfiltered with no outside inputs
except for a very small amount of air from an air stone. I had
ordered some rotifers about a year ago and placed them in the
system.
<Ahh!>
They did not last very long. I cleaned off
some algae from the side of the system recently and noticed
jellyfish that are about 2 mm maximum in size.
I am assuming
jellyfish eggs or planula came in the rotifers batch I received last
year.
<Likely so>
Their locomotion is identical to larger
jellies.
They have a clear/translucent bell, some reddish/maroon
color inside the bell and translucent tentacles or oral arms.
<Neato>
Have you ever heard of captive jellyfish outside of a
large institutional (city/corporate) aquarium?
<Oh yes... in
fact, a friend, Jim Stime, makes/sells Jelliquariums... and I saw
some very nice, much cheaper models a couple weeks back at the
Interzoo show in Germany... it's a biz>
Do you know of sources I
could use to identify these guys?
<Mmm... am referring you to Jim
Stime here... you can also reach him via Jelliquarium (.com)>
I
cannot provide a picture easily. They are too small for my camera
equipment.
<Macro settings, large file size... cropping...>
--
Thank you,
Greg S. Hurley
<Ahh! Had a fine H.S. Geometry
instructor with your family name here in San Diego... years back!
Cheers! Bob Fenner>
Re: Scyphozoa Question
6/16/08
Hello
Gregg and Bob,
The jellyfish portion of the hobby is just now
becoming possible. As such there is very little information
available... but its increasing.
I have kept, for only a short
time, Ctenophores, but have not been involved with their
reproductive cycle. Moon jellyfish are the most common and have the
greatest amount of research and information available. These are the
pale white discs with short fringe tentacles around the rim and the
familiar four-leaf clover pattern within the bell.
Most jellies
have a polyp stage where the medusa strobilates or a-sexually buds
off from the oral disc portion of the polyp. Once the juvenile has
freed himself he is now called an Ephyra. It takes another 60+ days
to raise these jellies to 2 or 3 inches.
Here is a short video of
my jellyfish production system >>
http://www.lafishguys.com/midwater/JellyNursery001.htm <<
Based
on your comment about " some reddish/maroon color inside the bell "
I suspect what you are either seeing the food stuff brought up into
the stomach of a Moon jelly species or you may possibly have a
species of Sea Nettle, Chryasora species. These tend to have much
longer tentacles... and ones that sting too.
Aside from the
Upside-down Jellyfish all other species typically require a tank
that keeps the jellies suspended once they have bud-off from the
polyp. Here is an article I wrote on the process >>
http://www.jelliquarium.com/DocumentPage.aspx?id=1034 <<
There
are only a few good books available on jellies. Most are written for
4th graders. Let me know if I can help you further.
Jim Stime,
Jr.
805-241-7140
Aquarium Design www.aquarium-design.com
MyFishTank.com www.myfishtank.com
Midwater Systems
www.jelliquarium.com
LA Fishguys www.lafishguys.com
<Ahh!
Thank you Jim. BobF>Re:
Scyphozoa Question
6/16/08
Hi Bob,
>> I saw some very nice, much cheaper models a couple weeks back at
the
Interzoo show in Germany... <<
Can you tell me anything
about these systems ?
<I picked/saved up some lit to give you I
picked up... just got to find it again!!! BobF>
Jim Stime, Jr.
Most impt.... they were very nice... and cheap... like about a
fourth of yours in cost... Trouble if they're offered in your mkt.
for shore. B.
Re: Scyphozoa Question 6/16/08
Bob and Jim,
<Mr. H.>
Thanks for the info. I think I might have to get into jellyfish.
Sounds like a fun new challenge.
<Are indeed>
Thank you,
Greg S. Hurley
<Welcome Greg. BobF> |
DIY Food 3/23/07
Hi Bob.
<Hello Brandon in Bob's
stead.>
I have been making my own DIY food.
<Cool.>
I have
put in sliced and fresh jellyfish in it.
<Hmmm. What kind of
grocery store do you have in town?>
Blend it with all the other
food. Some said that jellyfish is not in the diet of fish and corals so
I was wondering if it will cause any harm.
<This is sort of
true. There are fish that will eat them such as the Banner Fish, Arrow
Crabs have bee known to eat them as well as certain other fish and
snails.>
I only considered the addition of jellyfish after looking
up for its nutritional value. It is part of the diet of sea turtle.
<This is true.>
Is it all right to have jellyfish as part of the
diet for fish and corals?
<I would not be concerned with the
addition. I would watch the fishes after I fed it to them looking for
abnormal behavior. Brandon.>
Keeping upside-down jellies
4/10/06
Hey, you guys are awesome! There is so much info on your
site, I could look at this stuff all day long--and almost have! I have
a question about upside-down
jellies. I take care of a 125 gallon
tank with 8 jellies in it. The company that owns this tank has a budget
on how much they can spend on the tank so
they don't have the best
set-up for it--they went the cheap route.
<If it works...>
I
am looking into getting new equipment for this tank, tell me, if you had
a 125 gallon tank with 8 jellies, what would you get for the tank?
<...? Lighting, filtration?>
I've been researching non-stop in books
and on the internet to get as many opinions as I can and you guys seem
to know your stuff! So, to be specific: What kind of
substrate would
you have, would you have any plants?
<Soft, fine coral sand... and
yes... vascular plants from the same area as this species... might be
able to be collected...>
Would you have a protein skimmer, how about
a UV sterilizer?
<Yes to the skimmer, not likely a UV>
How about
the lights, what would be the best lights for them?
<T-5
fluorescents likely...>
What and how much would you feed them and
how often would you feed them?
<Depends on the species... are these
Cassiopeia?
http://jellieszone.com/captivejellies.htm>
And lastly, I have
been having a red/brown algae problem-- it is like a sheet of algae over
the top of the substrate. I stir it up daily
and that seems to help
for awhile--until the next day and I have to do it again. I've been
researching ways to treat the stuff, but I am so skeptical
because I
don't want to harm them and I know how sensitive and delicate they are.
Thank you so much for your help, it is greatly appreciated!
Candace
<... See WWM re controlling BGA. Bob Fenner> Tiny
Jellyfish 2/23/06
Hi Guys!
<Lesley>
Hope you
are keeping well - it's been a while since I last contacted you so I
hope you are all ok.
<I am, thanks>
Two days ago, in the smaller
of our two marine tanks, I noticed three, tiny white jellyfish-type
critters - literally, the mushroom shape, but
no tentacles - quite
"stiff" in structure and jerky in movement as opposed to the more fluid,
typical jellyfish. They were about 2mm - 3mm
in diameter and were
"swimming" around the tank being ignored by the fishy occupants. I
think they're cute! Anyway, today, I counted 7 of
these tiny
critters, varying in size from about 1mm to 3mm across the top of the
"mushroom". I still think they're cute but have no idea what
they
actually are or where they came from as we haven't added anything new to
the tank for several months. I wondered if you could help. Sorry
the description is so vague. Also, they are too small to photograph
clearly.
Any light you can shed on this would be most
appreciated!
Many thanks!
Lesley Saxton
<There are quite a
few Scyphozoan and Hydrozoan medusoid animals that can strobilize from
hard surfaces introduced in our marine systems... Use these terms in
your search tools... and you'll see. Bob Fenner>
Upside-Down
Jellies 2/23/06
Hey, you guys are awesome! There is
so much info on your site, I could look at this stuff all day long--and
almost have! I have a question about upside-down
jellies. I take
care of a 125 gallon tank with 8 jellies in it. The company that owns
this tank has a budget on how much they can spend on the tank so
they don't have the best set-up for it--they went the cheap route. I am
looking into getting new equipment for this tank, tell me, if you had a
125
gallon tank with 8 jellies, what would you get for the tank?
<...? Please see the new: Jelliquarium.com site here>
I've been
researching non-stop in books and on the internet to get as many
opinions as I can and you guys seem to know your stuff!
<Do you have
the works of Dave Wrobel? Search re his name...>
So, to be specific:
What kind of substrate would you have, would you have any plants? Would
you have a protein skimmer, how about a UV sterilizer? How about the
lights, what would be the best lights for them? What and how much would
you feed them and how often would you feed them? And lastly, I have been
having a red/brown alga problem--
it is like a sheet of alga over
the top of the substrate. I stir it up daily and that seems to help for
awhile--until the next day and I have to do it
again. I've been
researching ways to treat the stuff, but I am so skeptical because I
don't want to harm them and I know how sensitive and delicate they
are. Thank you so much for your help, it is greatly appreciated!
Candace
<Keep searching, reading... Bob Fenner>
Baby jellies... or some other creature? 1/4/06
Hi crew,
<Chris>
Sheesh. I had to get creative to photograph these
critters. I snagged one with an eyedropper, placed it in a water
drop on
a slide, and popped it into my $20 National Geographic
'scope. After removing the eyepiece shield, I was able to snap a few
photos of reasonable enough quality for ID purposes... I hope.
<Neat>
These pics are slightly out of focus, but the best I
could get and still get the whole thing. (‘scope/lens/user?
limitations)
I've seen some dozens of these, over the past few
days, in my 55G saltwater tank. I'm seeing fewer lately, due to
losses in
my power heads and/or filtration, I suppose. (Or
predation?)
<A combo. no doubt>
I didn’t notice them today,
until swishing around my LR with a turkey baster... blowing off some
food that had “settled”.
(Perhaps these had “settled” too... and
I stirred them up?)
<Likely so>
Anyhow, they look for all
the world like mini-jellyfish of some sort, though I couldn't
imagine from whence they came. My only
recent addition is a 6"
ball of Caulerpa Racemosa from my QT.
(Note that this QT also
contains assorted amphipods, worms, and other tiny marine life that
has accumulated over time)
The Caulerpa had been in the QT for
three weeks.
<Mmm, are some sort of medusoid life>
Most are
about the size of this period. (Some are a bit larger)
The
photos show the rest of my observation. At "rest", they’re full of
water, their "valve" is closed, and you can see a few
small
protrusions between the two dark spots at the valve end. To move,
they appear to expel water through the “valve”, and
they
contract axially, while extending longitudinally.
(Moving away
from the “valve” end, of course)
<Yes>
Enough of my
rambling, I suppose. Please edit and ditch any irrelevant babbling
as you see fit. I won’t mind.
Do these look like anything you’ve
seen before?
<Mmm, yes... juvenile "jellies" of some sort
(Scyphozoans, Hydrozoans) or ctenophorans...>
Feel free to whack
me in the head with a book of your choice, if these are something
very common that I should’ve found on
a simple web search. (I
looked, but perhaps not hard enough) Tell me if you need more info,
tank specs/inhabitants, etc...
Thanks in advance,
Chris
<I wouldn't be overly concerned re these being in your system...
likely "strobilized" from the new algae... or some other substrate.
Will pass with time. Bob Fenner> |  
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Comb Jellyfish 12/13/05
Hi Bob,
<Jimbo>
Quick note. See
attached picture
<Nice>
The jellyfish product line keeps
growing. I just received a shipment of Comb Jellies out of Key West last
week.
<How old are most comb jellies? Most are in their teens
(Ctenophora)>
Under the MH their fine rows of hairs reflect the
light in a UFO landing strip type light show.
Awesome !
Jim
Stime, jr.
Resplendent Group
Aquarium Design
www.aquarium-design.com
MyFishTank.com www.myfishtank.com
Midwater Systems www.jelliquarium.com
Centropyge.Net
www.centropyge.net
MACNA X www.masla.com/macnax.html
<Beauty.
Bob Fenner sans list> |
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Jellyfish System
9/20/05
hi Bob,
<Jimbo>
well, it is the night before
i drive out to Las Vegas for the Super Zoo
pet trade show to
exhibit the JelliQuarium. i hope i have everything packed :)
<Me too!>
i have not had much of a chance to get all the
Jellyfish things together
that we spoke of as i have been buzy
getting everything for the trade
show squared away but i do want
to get some stuff to you.
i am working on the advertisement for
both FAMA and Aquarium Fish
Magazine. you were correct about
FAMA's circulation being down, its
around 10,000/ mth, AFM is up
around 50,000/ mth. i asked for Susan
Steele but she was not
around. i am working with Craig Horowitz.
<Good... I called re
Sue... s/w Alicia Jordan... who is heading up FAMA...
said Sue
had "not elected" to move down... was consulting somewhat... I'd
call Bowtie/Fancy corp. and s/w Alicia re who in turn to speak with>
the scientific article written by Kevin Raskof i mentioned is
attached
as a PDF. it is a great article.
<Will take a
look/see>
also attached are pictures i took of the various
stages of growing Moon
Jellyfish, Aurelia aurita....
<Very
nice>
2027 polyps
2031 polyps
2039 sm jelly
2040 two sm jellies
2058 current holding / growing system
2077 ephyra ( babies )
2078 ephyra ( babies )
2097
mastigias papua sp.
2098 mastigias papua sp.
have a great
time in Kona next month, i will be thinking of you in
paradise :)
<And joining me soon I hope/trust. BobF>
Jim
Stime, jr.
Resplendent Group
Aquarium Design <http://www.aquarium-design.com/>
www.aquarium-design.com
MyFishTank.com <http://www.myfishtank.com/>
www.myfishtank.com
Midwater Systems <http://www.jellyfishtanks.com/>
www.jellyfishtanks.com
Centropyge.Net <http://www.centropyge.net/>
www.centropyge.net
MACNA X <http://www.masla.com/macnax.html>
www.masla.com/macnax.html |    |    |
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