Two-legged Comb Jelly

This species was photographed midwater at the Seaway. It might be a Comb Jelly. I assigned a possible identification based on the two lobes and body shape. However, I am pretty sure the identification will prove to be wrong or impossible. On one photo it even looks like a pelagic Opisthobranch, but there is no conclusive evidence since the animal seems to be transparent all over and not showing organs or even a calcerous structure. It shows a bilateral symmetry though.