'Thousands' of a jellyfish-like creature washed up on a beach in Cornwall this week. A huge pile of the unusual creature is thought to have been blown in by strong winds. , who take care of the in North West Cornwall, say they arrived to a "sad" sight on Thursday (May 23).
They estimate that thousands of by-the-wind-sailors had been blown onto the beach. According to Cornwall Wildlife Trust, by-the-wind-sailors are a type of colonial hydroid. They are similar to Portuguese Man O'Wars as they are made up of a colony of different organisms that live together to make it look like one animal.
The species gets its name from its characteristic 'sail' which allows them to catch the wind and travel on ocean currents. It can be identified by its blue-purple oval disc and a thin semi-circular fin diagonally across the top. The creature also has short tentacles which hang down into the water.
These are used to sting prey, such as young fish and other small but aren't thought to be harmful to humans. They are typically found washed up in their hundreds and thousands after stormy as they are completely at the mercy of the winds. Friends of Portheras Cove believe the group that washed up on the beach this week were brought in by strong, on-shore, north westerly winds.
In a post, the wrote: "Mass stranding of 1000s of By-the-Wind-Sailors at the cove today due to the strong on-shore North Westerlies. So sad to see these amazing creatures like this. "They are tiny hydrozoans, each one a colon.