Aequorea sp. in Devon

Many individuals of this genus spotted whilst swimming off Plymouth Hoe. 5/6 (8 max) inches in diameter. Slight blueish tinge, many tentacles, very clear canals. Found swimming in surface waters along with many of the Family Pandeidae... possibly Leukartiara? or Neoturris..... At least 20 of the hydrozoans were seen. Sorry the pictures aren't that good!