I have just returned from a holiday in Majorca (Cala Egos) One evening around 7pm these blue jelly fish type creatures (100s of them) washed up on the beach. I just wondered what they are and why they washed up as there was no really any tide. Thanks in advance.
Just got back from Menorca and saw the same things. They are Velella vellela,the"by the wind sailor. They've been observed aound our own coasts and California.