My baby cousins have this lamp and it was a major talking point when I last visited them!
Promising review: "I like to occasionally add decorations to our guest house and this one turned out to be a real conversation starter. The guest comment on how they love just relaxing and watching the jellyfish. There is a multi-color light or you can choose a single color. I like the blue myself. This was a good project for my girls to work on together. They soaked the jellyfish in soapy water (blue Dawn) overnight, then rinsed them off as to not make the water turn blue. Then they filled the plastic tank with distilled water, added the jellyfish, and viola, instant feed-free aquatic life. This comes with everything you need to get you up and running: tank, lid, motor, cord, wall outlet head, and two four-inch jellyfish that are unique from one another. The motor shuts off after four hours. It comes in a gift box if case you are gifting." —Texas Knowhow
Get it from Amazon for $36.99.