Hundreds of "stunningly beautiful" blue sea creatures have washed up along parts of the Welsh coastline. Velella velella, commonly known as by-the-wind sailors and closely related to the Portuguese man o' war, have been spotted on beaches across Anglesey, Gwynedd and Tenby. One woman who found one of the free-floating hydrozoans on Tenby South beach said it was "like a crystal". Marine specialist Frankie Hobro, of Anglesey Sea Zoo, said the creatures were beautiful but warned people not to