A couple of weeks ago I went to the beach. I can count on one hand how many times I had been to the beach before this visit so I was surprised to find so many jellyfish washed up ashore. Looking at photos of jellyfish common in the UK I think I have seen many compass jellyfish as well as some barrel jellyfish. The former were very flat once washed up, and they seemed translucent apart from the markings on top of their dome. The latter seemed much more solid and white/bluish and opaque in colour. I decided to draw them both, how I remember them.
For the background, I scanned a piece of coloured paper that has some visible fibres to it.