Mini Jelly
 

Any one every find one of these floating around ??


http://youtu.be/IWNo3FeYii0

Verry odd wounder what IT is?

Very cool little jellyfish . I've run into these in one of my baby fish cultures . They multiply like crazy and eventually took over the entire 10g tank killing everything in it. It was pretty cool an entire little tank was filled with thousands of them .
I think in our bigger reef tanks they may appear as hitchhikers but disappear real quick in the pumps and such.

Yes, in my old 33g seahorse reef tank, back around 2003, I would see one of these tiny "jellies" flitting about the tank every couple of weeks. Sometimes as many as 3 or 4. I think they are the medusa stage of hydroids. Cool addition to a tank's biodiversity. I think there was only one tiny patch of hydroids on a piece of live rock in that tank.

jelly
 

it is an upside down jelly fish.i usually get them from my brine shrimp eggs.you might see them as small stalks on your rock before they release into the water column.you can raise them in a small tank as they feed on light as well as a bit of phytoplankton.they can grow up to 6 inches

https://www.youtube.com/watch?v=ou2Iq3k34lU

Yup, I had a bloom of them when I first started my 5 gallon and they just died off themselves after awhile. I still see one or two every once and awhile. I agree with Anthony, definitely a medusa stage of a hydroid.

This is correct. :)