Sea jelly unknown. Help! Experienced beachcombers perplexed!

Sea jelly unknown. Help! Experienced beachcombers perplexed!

Observation - Sea jelly unknown. Help! Experienced beachcombers perplexed! - UK and Ireland. Description: A Sussex Wildlife Trust Officer discovered this on a Sussex beach. She nor any other biologists aske

A Sussex Wildlife Trust Officer discovered this on a Sussex beach. She nor any other biologists asked know what this is!