Tourists are urged to be careful when visiting this popular holiday destination as a seriously rare sea creature similar to a jellyfish has been spotted on a busy beach - and it's stings can be harmful ... .
Another Spanish beach has closed after the invasion of the potentially deadly blue dragon sea creatures as the venomous species continues to spread across the country.
The creature was released unharmed into the deep ... Speaking of Martian-looking denizens of the deep, a Russian fisherman made a splash in February after sharing footage of a bizarre, bulbous sea creature that viewers have compared to an “alien.”.