Jellyfish like critter...

[Drizzieee]

Saw this about 2 minutes ago caught it not sure what it is but my damsel almost got to it before I could lol any ideas? Sorry the video is not too clear but this thing is just too fast to focus lol. But it literally looks like a super tiny jellyfish and swims like it.

 

[calvertc425]

maybe a hydroid? SP?

 

[calvertc425]

maybe a hydroid? SP?

 

[calvertc425]

maybe a hydroid? SP?

 

[Drizzieee]

maybe a hydroid? SP?

Ehhh it was very round and seemed to be fully developed as far as appearance and wasn’t shaped like such, but dang close not gonna lie.

 

[Mikedawg]

I volunteer in a jelly lab and that sure does look like a jelly in its free swimming ephyra stage

 

[mjk250]

I had upside down jellyfish hitch-hike on something, they reproduced like crazy in several of my tanks, they were alive for a few years and one day just stopped reproducing and went away... I need to find my videos of them. They were so cool to watch. They used to swim just like that and when small would occasionally be attached to the glass, as they grew they used to pulse mainly on the sand bed and rarely moved around much.

 

[Auto-pilot]

Its A hydroid! Get rid of it, if you dont't have hydroids theses guys can be super hard to remove. Once set in they lad on rocks they grow colonies and its all over

 

[Sallstrom]

I would guess upside down jellyfish ephyra, the first medusa(free swimming phase) stage.

 

[Drizzieee]

Lol glad i guessed right you guys are putting my mind at ease and thankfully he has been eaten by the devil damsel himself [emoji1787]

 

[El_Guapo13]

As someone who has a ton of Upside Down Jellyfish polyps in his reef tank, I can say that it looks a lot like the ephyra stage of the Jellyfish, which I get several of every week. Currently tyring to raise one past the ephyra stage so I can have myself an adult Upside Down Jellyfish. So everyone wish me luck with that.

 

[Otter Water Reefing]

As someone who has a ton of Upside Down Jellyfish polyps in his reef tank, I can say that it looks a lot like the ephyra stage of the Jellyfish, which I get several of every week. Currently tyring to raise one past the ephyra stage so I can have myself an adult Upside Down Jellyfish. So everyone wish me luck with that.

I too have a lot of what look to be upside down jellyfish polyps in my tank (112g system). I've had them for a while, they don't seem to be causing any problems. Most of them are growing in the caves of my tank. I didn't know those little polyps were related to the little swimming/ephyra stage jellies I was seeing occasionally.

Today during feeding I changed my gyre settings slightly and saw a release of like 6-10 swimming jellies all of the sudden. I try to pull them out with a turkey baster when I see them swimming. I kind of doubt it actually affects their numbers, though.

I started researching them a bit more to see if I had a budding problem on my hands - thankfully, it looks like they're not too much of a nuisance? Are they actually seen as a positive tank inhabitant? The swimming stage is pretty cute ;)

My question - what does an adult upside down jellyfish look like? When I search online I only come up with large jellies that get over 1ft dia.

Thanks!

 

[El_Guapo13]

I too have a lot of what look to be upside down jellyfish polyps in my tank (112g system). I've had them for a while, they don't seem to be causing any problems. Most of them are growing in the caves of my tank. I didn't know those little polyps were related to the little swimming/ephyra stage jellies I was seeing occasionally.

Today during feeding I changed my gyre settings slightly and saw a release of like 6-10 swimming jellies all of the sudden. I try to pull them out with a turkey baster when I see them swimming. I kind of doubt it actually affects their numbers, though.

I started researching them a bit more to see if I had a budding problem on my hands - thankfully, it looks like they're not too much of a nuisance? Are they actually seen as a positive tank inhabitant? The swimming stage is pretty cute ;)

My question - what does an adult upside down jellyfish look like? When I search online I only come up with large jellies that get over 1ft dia.

Thanks!

They can be a nuisance, if the polyps are touching coral directly they will sting it just the same as any hydroid, or anemone, or another coral. But otherwise, they don't actively seek to harm anything in thw tank, so unlike Aiptasia you won't have to worry about the polyps actively tring to kill any critter that comes within striking distance of them.

Larger Upside Down Jellyfish can get to around 1ft in diameter, but I think average size is about 5 to 6 inches.

Unfortunately my little Jelly died after two months. Also, the past January I was forced to move everything into a new tank, and I think the move led to most if not all of my polyps dying out. If there are any still in my tank, then they must be someplace I can't see and must not be releasing ephyra lately. Which is sad.

Oh well, maybe in a few years I will try to setup a tank just for Upside Down Jellyfish. Until then, I will just focus on my reef tank. And also make some improvements here and there to my freshwater community tank too.

 

[Otter Water Reefing]

They can be a nuisance, if the polyps are touching coral directly they will sting it just the same as any hydroid, or anemone, or another coral. But otherwise, they don't actively seek to harm anything in thw tank, so unlike Aiptasia you won't have to worry about the polyps actively tring to kill any critter that comes within striking distance of them.

Larger Upside Down Jellyfish can get to around 1ft in diameter, but I think average size is about 5 to 6 inches.

Unfortunately my little Jelly died after two months. Also, the past January I was forced to move everything into a new tank, and I think the move led to most if not all of my polyps dying out. If there are any still in my tank, then they must be someplace I can't see and must not be releasing ephyra lately. Which is sad.

Oh well, maybe in a few years I will try to setup a tank just for Upside Down Jellyfish. Until then, I will just focus on my reef tank. And also make some improvements here and there to my freshwater community tank too.

Thanks :) Glad that everyone doesn't seemed freaked out about their presence. There certainly are a lot of little polyps in places but they don't seem to be trying to dominate the tank. I guess we will find out in a year or two if they're still a balanced element of my tank.

 

[El_Guapo13]

Thanks :) Glad that everyone doesn't seemed freaked out about their presence. There certainly are a lot of little polyps in places but they don't seem to be trying to dominate the tank. I guess we will find out in a year or two if they're still a balanced element of my tank.

Most people eventually have them die off. Based off of what I have read here on R2R, anyway.

 

[Otter Water Reefing]

Most people eventually have them die off. Based off of what I have read here on R2R, anyway.

Ah, well that's encouraging to hear, thanks!

 

[Reefingpops52]

Saw this about 2 minutes ago caught it not sure what it is but my damsel almost got to it before I could lol any ideas? Sorry the video is not too clear but this thing is just too fast to focus lol. But it literally looks like a super tiny jellyfish and swims like it.

I just discovered one in my tank as well after some research I discovered it's a day or two old baby upsidedown jelly.

 

[Reefingpops52]

Saw this about 2 minutes ago caught it not sure what it is but my damsel almost got to it before I could lol any ideas? Sorry the video is not too clear but this thing is just too fast to focus lol. But it literally looks like a super tiny jellyfish and swims like it.

I also discovered one in my tank today after some research I discovered that it's approximately a two day old baby upsidedown jellyfish.