Thread: Unknown Sea Creature - who can identify it?

I can't view the u-tube clip, but from your description it sounds like some sort of ray.

What an interesting looking critter!!!!
Andrew

Nothing Ray like about it.
Like the way it propells itself.
Interesting to hear what it is.
Andrew

Were you able to see the clip Andy?

Yep
if you cant go to utube "sea creature.wmv" you may find it on a search.
Andrew

I've seen similar type things in aquariums, maybe a sea slug..?

I'm having trouble accessing the youtube link too, but Andys idea of doing a google search seems to work, though going right to my youtube page doesn't!

I don't know about it being a slug, it didn't touch the sea bed, was about 1mm thick and moved on a vertical axis. Having said all this, I don't know enough about the varieties of sea slugs. It is about the size of a butterfly but "flies" / swims with this rythmic ripple.

Hexabranchus sanguineus a Sea Slug, the tropical ones are brightly coloured
The Spanish Dancer, with its colorful, feather-like gills exposed, is found throughout Indo-Pacific reefs and is the largest of all the nudibranchs. It is generally seen undulating about the rock or hovering around the rock base. It is red to orange in color, grows from 2½ inches to 2 feet, and is equipped with six separate gills that withdraw into their own sheath. The Spanish Dancer is extremely difficult to maintain in an aquarium and needs to be in a well-established reef system. In the wild, the Spanish Dancer appears to be immune to fish attacks; apparently it has an offensive taste. It will not tolerate copper-based medications or high nitrates in the water.
It is carnivorous and feeds primarily on several types of sponges. Because of this, only experts who have had considerable experience with and knowledge of Nudibranchs should attempt to maintain them.