While the man o' war closely resembles a jellyfish, it actually belongs to a group called siphonophores. They're named for ...

and they all play a significant role in determining how your day at the beach is going to go. A tall flag pole with one or two colored flags will often be one of the first things you see when arriving ...

This beautiful beach in Tenerife has just put up warning flags to caution visitors about harmful species that have taken over the area. Article continues below Yellow flags have been raised to ...