Tiny free swimming jellyfish?

bradv123

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Hello,
I found this tiny free swimming jellyfish in my refugium. It started swimming towards the surface when I turned off my return pump and the water settled. I only saw the one and I'm just curious what is it. It's almost all clear with some little red dots. Might not even be a jellyfish, who knows? For reference the lines off to the right are 1/2 inch apart so it's pretty tiny. Probably about 1mm long


Thanks

PXL_20201215_235752120.jpg
 
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vetteguy53081

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They’re hydroids that free swim and then stick to a surface and wait for food
They’re capable of stinging nearby coral
 
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bradv123

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They’re hydroids that free swim and then stick to a surface and wait for food
They’re capable of stinging nearby coral
If you mean sticking to the surface and not moving (like surface tension almost) then it wasn't doing that. It was just swimming around near the surface
 
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bradv123

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Thanks for clearer explanation
I think we’re looking here at a baby pistol shrimp
Thank you, but I'm not sure I agree. I was trying to find images of baby pistol shrimps / pictures of their lifecycle and I didn't see anything that looked the same or even very similar. Is there a source you recommend looking at? Also as an update I turned off my return pump and watched my fuge for probably close to 10 minutes and found another one
 
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vetteguy53081

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Thank you, but I'm not sure I agree. I was trying to find images of baby pistol shrimps / pictures of their lifecycle and I didn't see anything that looked the same or even very similar. Is there a source you recommend looking at? Also as an update I turned off my return pump and watched my fuge for probably close to 10 minutes and found another one
Google pistol shrimp eggs, pistol shrimp babies, pistol shrimp fry and pistol shrimp hatchlings videos


1DA8298D-24E8-4716-8246-E970B5EF0037.jpeg
 
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bradv123

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Google pistol shrimp eggs, pistol shrimp babies, pistol shrimp fry and pistol shrimp hatchlings videos


1DA8298D-24E8-4716-8246-E970B5EF0037.jpeg
The ones in the video look fairly similar, but it looks like they have two spots which looks like eyes. The ones I have look like they have one spot at the top of an upside down bowl. and several more spots around the perimeter of the bowls rim if that makes sense
 

afishbestservedcold

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The ones in the video look fairly similar, but it looks like they have two spots which looks like eyes. The ones I have look like they have one spot at the top of an upside down bowl. and several more spots around the perimeter of the bowls rim if that makes sense
I just meant red spots probably mean its something a little cooler than an amphipod/copepod/ostracods, lots of jellies have spots.

I agree with everyone on the crustacean vibe, the movement looks very baby shrimp. Can you get a macro photo of one?? I use a jewelers lupe held up against my phone camera and it works great if you have a lupe handy
 

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