Jellyfish ID

[MMM33732]

I've been searching for a while now and can't seem to find a picture or ID of what I'm looking for. So last time I was in Jamaica snorkeling (time of year was May, northwestern part of the island), I came across quite a few jellyfish. They were about 2.5" and either did not have tentacles or if they did, they were very short. The were a transparent tan color. Almost looked like a clear/tan plastic bag floating around. They were at a depth of about 1-4ft during the day. Any ideas of what they may have been? Closest thing I can find is the thimble jellyfish, however all literature seems to say those only get to be 1" in diameter. These were bigger at about 2.5". No marking on the bell that I recall. Any ideas?

 

[Betta132]

Comb jellies? I've seen them in Galveston. Looks like somebody put a tiny clear bag in the water.

 

[MMM33732]

Comb jellies? I've seen them in Galveston. Looks like somebody put a tiny clear bag in the water.

I don't think that was it. The comb jelly has distinct lines on the sides of its bell. At least from pics. This had no distinct makings that I recall. Just kind of a floating blob. Like a transparent tan/brown sandwich bag looking thing.