Having trouble getting an ID on this 'thing'

[Fanof49ASU]

This is almost transparent, that I found floating in the current. I can't see the base of it.
Any ideas?

http://markfoltz.freeservers.com/UFO1.jpg

http://markfoltz.freeservers.com/UFO2.jpg

http://markfoltz.freeservers.com/UFO3.jpg

Someone has mentioned that it could be the 'beginnings of a jellyfish', since I have hydroids in the tank.

What do you think?

[Roy G. Biv]

Wow.. Thats Cool!!

[kar93]

Looks like a flatworm

[Fanof49ASU]

I have received some interesting info on this. It's worth reading.
Our tanks and inhabitants can be very dangerous.

http://reefcentral.com/forums/showthread.php?s=&postid=11497267#post11497267

[kar93]

WOW, never thought anything like that could end up in a tank especally something irukandji. I read that jellyfish cannot live in rectangular aquariums because they would need a round aquarium

[Fishie Nut]

Scary!

I was in Sydney, Manley beach, jellyfish all over the beach and in the water - Man Of War type -- They call them Blue Bottles. Announcements over a loud speaker, signs "Blue Bottles in the Water." IT DIDN'T STOP ANYONE FROM GOING IN THE WATER. TOPLESS AND HAPPY, SWIMMING AROUND.

I sat on the beach and just oogled... LOL. No way I'm going in the the water. It was an experience.