The young kid along the shore said this was a jellyfish egg pouch, but I think it’s actually a moon jellyfish. There weren’t a huge number of these washing up, but a few did come in with the tide. This was one of the more ‘whole’ looking ones. The kids were holding them, so I guess they weren’t the stinging type.
Picture taken with Sony a6000, SEL18200 lens @ 149mm, 1/30 sec, f/10, ISO 100