This gallery contains 3 photos. While not as large as their Pacific cousins, Japanese sea nettles are still a big draw at the Vancouver Aquarium. Especially when they congregate in a smack (the proper term of venery) like this one.
Their striped medusa (hoods) distinguish Japanese sea nettles (aka brown jellyfish) from Pacific sea nettles.
Their undersides hint at delicate, nebulous, and luminous creatures that can nonetheless deliver a nasty though rarely fatal sting if provoked.