FAQs on the Scyphozoans and Hydrozoans
Related Articles: Jellyfishes, Scyphozoans, Hydrozoan Jellies, Hydrozoans, Cnidarians,
Related FAQs: Jellies 1, Jellies 2, Jelly
Selection, Jelly Systems,
Jelly Feeding, Jelly Reproduction,
What this genus does...
Blue Jellyfish, ID, sys. 1/14/10
Hello I would like to first start off by saying I am a newfound lover
of the marine aquarium hobby. I love it and have proceeded rather
quickly at it as well...
<Welcome to our wonderful, seemingly all-encompassing
I have had several fishes die unfortunately due to a very fast start
and learned my lesson. I am the owner of 3 tanks and have put in a
fourth tank containing blue jellyfish. My jellyfish are using matured
water from my another stable system, ammonia and nitrites at 0. They
are running right now a cascade filter. 25 gallon tank with a 50 gallon
cascade. I want to know several things, right now I cant get my camera
to work but would like to send you pictures for ID as to know if they
sting/swim or what not.
<And I will in turn send them on to friend Jim Stime of Jelliquarium
for his help>
Next I need to know what kind of filtration needs they might have,
further than the cascade that is. I can get several items as I have a
pretty good supplier, but I do live in Costa Rica,
<Ahh! I have visited there a few times... San Jose, the Guanacaste
area, even out to Limon. A great, progressive country in my
so availability and pricing are not the best. Also my jellyfish which I
have had for a day seem to float at the top of the tank, right at the
water level. I want to know why they stay at the top, they seem to be
able to swim when they want to, they just choose to stay at the top.
Not stuck in a corner because they move when they want to, just there.
Is it lack of circulation, what can I use to correct this?
<Am going to send this letter on to JimS and have him respond. He
knows MUCH more than I re these jellies practical husbandry>
Please let me know as I have several species here that I really like
and I have had a hand pick selection including a wartskin angler that I
need ID on (black with orange dots and rock colored spotting), I think
commerson frogfish or maybe fancy frogfish, clown trigger,
<!? A bruiser.>
Humu Humu and a few others. Please help me with these jellyfish quickly
so they can survive, I can get them Artemia to start, I have some
actually. Then if you can help me with the rest I would like that as
well but the others are doing fine now, its the jellies I'm worried
Thanks for your time.
<Jim, please respond directly and back to me. Bob Fenner>
Re: Blue Jellyfish, hlth. 1/14/10
What is a bruiser?
<The Clown Trigger!>
The black frogfish I asked you about? Anyways I'm really worried
about the jellies, 2 are now at the bottom of the tank and 2 are at the
top of the tank just floating, I dont think I see them moving, I might
be wrong. They look slimy. like they are releasing some slime I mean...
can you please help me so I can see if I can get them to be ok?
<How? Sans pix or data? Please read here:
and the linked files above>
Also do you have time to just look at the pictures of my fish and help
me identify them?
I would really appreciate that. Oh, one more thing, how do you feel
about yellow frilly scorpion fish?
<See WWM re>
worth $500 (and keep in mind that fish are expensive here, $200 for my
clown triggerfish, and that was wholesale, $300 at the aquariums). What
else can you tell me so I dont get myself stuck in the predicament I am
in right now with the jellyfish. I dont want these animals to die,
first and foremost I love sea creatures and dont want to kill them,
second of all I spent a hundred bucks a pop for these jellies. help
ps.. I appreciate you looking out for assistance so you can help me
better. Thank you and your friend.
<? Keep reading. BobF>
Re: Blue Jellyfish 1/16/10
Hello Xavierhe and Bob
>> containing blue jellyfish. <<
Most likely Catostylus mosaicus or the Blue Blubber
>> They are running right now a cascade filter. 25 gallon tank
with a 50 gallon cascade. <<
What is a cascade filter?
>> if they sting/swim or what not. <<
In my experience I have NOT felt any sting, but I am sure they have
some ability. Best to use gloves when handling any jellyfish
>> Next I need to know what kind of filtration needs they might
have, further than the cascade that is. <<
Simple standard biological filtration, similar to a regular aquarium. I
see a competitor of mine is using a simple bowl/ sphere with an
>> I can get several items as I have a pretty good supplier, but
I do live in Costa Rica, <<
These are OK to start with but I do not know of anyone who has had long
term success with these. Generally if you can keep them for six months
you will have done well. It is believed that they are photosynthetic
and their mouths receive their food via 'radial canals' within
each of those 'lobed' tentacles. This I believe means its very
small food items, possibly copepods. I have tried several times to keep
these jellies myself, all without success.
>> Also my jellyfish which I have had for a day seem to float at
the top of the tank, right at the water level. <<
Assuming you just received the jellies its possible they have not
acclimated to your salinity, hence they are buoyant.
Personally I am avoiding the tropical species due to their difficulty
and working with the temperate Moon and Sea Nettle species.
Jim Stime, jr
Aquarium Design - Installation and Maintenance
MyFishTank.com - Acrylic Aquariums and Quality Aquarium Furniture
Midwater Systems - JELLIQUARIUM Jellyfish Display Systems
LA Fishguys - Aquarium Reality Television
Thanks much Jim. Hey, are you thinking of attending Interzoo this year?
Can you maybe even slide in a week ahead of the May event to do a bit
of diving in the Red Sea?
Re: Blue Jellyfish
Hi Bob, going to one of those shows would be awesome, especially going
to the Red Sea... but I really cant afford to take time off work ( I
backed out of that free trip to Kona this month and I am doing
out-of-town jobs to fill in for the locals I've lost ) and I
don't scuba, yet... but I heard from a service customer who went
there and snorkeled and saw lots of stuff.
Jim Stime, jr
<Ah my friend. Remember years ago my urging you to take off at least
once a quarter... I do hope we both live long enough to get out MUCH
more often. Cheers, BobF>
Is Brown Jelly Disease between LPS only, or can it be
carried into your system on a Softie as well ? -- 10/02/08
<Mmm, strictly speaking, the latter> Hello. Quick question for
you. I was going to meet another reefer tonight to swap some zoo frags,
and possibly swap a LPS. I was looking for pictures of his tank on a
local forum, and found that he had a problem with Brown Jelly about 2
weeks ago on one of his large wall hammers, that killed off about 85%
of it. <Yeeikes> Should I cancel the trade of the zoos with him
or can a soft coral not carry the bacteria into my tank? <I would
either cancel, or plan on isolating any newcomers for a few to several
weeks... running them through a slightly depressed (a thousandth or
two) spg... and iodine/ide treatment/bath enroute> Should I
definitely keep away from trading any LPS and Softies as well with him
? <Anything in the tank, the water itself, could be a
"carrier" of hyperinfective agents> How contagious is
Brown Jelly between healthy corals if a coral comes from a tank that
recently lost a coral to Brown Jelly? <Can be devastating to not
so> I know....my bad, but I don't have a Quarantine set up.
Thanks! Pam <You've answered the question then... I would put
the money instead into/towards this new set up. Bob Fenner>