Jellyfish & Prey

Can anyone ID this jellyfish and its contents - Criccieth, N. Wales.

Thanks

Have had a look around and I think this is a blue jellyfish - Cyanea lamarkii, and sea louse - Eurydice pulchra.

Definitely Cyanea, but his 'little buddy' is a Hyperiid amphipod, parasitic... they eat the jelly's food, then eat the jelly!

Very interesting!! Thanks very much for the info.

Mark