What is the species and luminosity of this jellyfish?

Hi

First Jellies are not actual fish,.. so the name Jellyfish is kind of wrong.. no idea why they were named that.

Where did you get these Jellies? Its illegal in many places.. so you better check that out..

Also it is unlikely they will survive in captivity..

Unless you eally know what you are doing.. very specialized care...

Having said that

Your description fits many Jellies.

It sounds closely tot he Box jelly variety,,and yes they can be quite small .. grow with age.

You really need to ID these jellies.. because IF you get stung by one without ID you could bein real trouble.

Some stings require antivenom that MOST US ermergency rooms simply do not have readily available.

Far as the Lighting questions?? No not all Jelleis are biolumnescent.. Larger aquariums will use a blue background and use lighting on the side of the tank to help Jellies show up..

So if yours dont glow or illuminate... don do anything to them as they either have it or they dont... Your might not

I urge youto contact your local University zoology or Marine Biology Programs to held ID these.. als can try Sea world, they are great and have very experienced Marine Biologists on hand.

Should you be stung... and you do not know the type of jelly you have... You have to seek Medical attnetion Immediately...

Even a small Box Jelly can kill an adult in a very short amount of time.

Things you can do to help yourself til you get help are...

inactivate the stingers.. by..

using 5% white vinegar nd water solution.. dump it over the area. You can also use salt water but not fresh water

Using fresh water, rubbing the wound, using alcohol, Urine,or ammonia will only encourage the release of more venom.

Once you deactivate the stinging cells have to come out.. you can pick them out carefully by removing the tentacles left on the body then you can use a credit card to kind of shave teh area and pull anything left out by scraping along the area affected.

Keep in mind you will kill your jelly by the use of the above in him if it contacts any part of the live jelly.

I hope that if you are going to keep these buggers you get educated as to the care, safety and Species you have.. For your sake and thiers

Good Luck

Wismom

It sounds very similar to irikanji - although I doubt very much you'd be keeping those deadly little beauties at home. Ditto box jellyfish - although their tentacles tend to grow much longer.

I don't think all jelly fish are light producing. I believe it depends on the depth of water that they commonly inhabit.

The dots aren't its eyes

Blue ringed octopus - venomous enough to kill a person within 10 minutes. Irukandji jellyfish very small, very venomous. Lifeguards wear pantyhose or body stockings to avoid their sting.

I would consult someone at a University that will actually give you the correct answers. Maybe talk to some one in marine biology. Sounds fascinating!