Found thousands of these translucent blue, plastic-looking ovals washed up on the beach today. They have a stiff fin on top and blue jelly underneath. Are they dangerous?

If you do experience a sting from a Velella velella, it is likely to be very mild. Most people report only a slight tingling sensation or irritation. Washing the area with seawater, followed by fresh water, and applying a soothing lotion or cream can help.

If any unusual symptoms occur, such as persistent pain, swelling, or an allergic reaction, it’s advisable to seek medical attention. Such reactions are rare, but it’s always better to err on the side of caution.

Mass strandings of Velella velella are not uncommon and are usually the result of wind and ocean currents. These organisms drift on the ocean’s surface, using their sails to catch the wind. When strong onshore winds occur, they can be blown onto beaches in large numbers.

This phenomenon is more common in spring and summer months when weather conditions favor such strandings. While it may seem alarming to see thousands washed up at once, it is a natural event that has been occurring for centuries.