further to my previous question. Can anyone identify these jelly like lumps which contain either a brown or pink creature within. They are about 25mm to 50mm in diameter and gave appeared in their hundreds if not thousands on Brighton beach. The majority are attached to pebbles which they resemble. Seagulls appear not to eat them.

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Jelly lumps are notoriously difficult to ID once out of the water and degrading on a beach and I'm not sure I can get very far here.  In general there are a few possibilities
- some kind of (invertebrate) egg mass
- jellyfish
- comb jellies/sea gooseberries (ctenophore)

I think I would opt for jellyfish here, unless they are physically attached to the pebbles.