Jellyfish
Barrel Jellyfish
Rhizostoma octopus
How to spot it
A huge, solid, dome-shaped bell (the 'dustbin-lid' jelly) with NO long trailing tentacles. Underneath hang eight thick, frilly cauliflower-like arms. Mostly harmless despite its size.
Usually seen at
8-85 m (median 18 m)
Size
Large (over 50 cm)
Habitat
Open water, Near surface, Midwater
Behaviour
Solitary
Where it's seen
Occurrence records around the UK and north-east Atlantic (OBIS).