The mighty man o’ war While it may look like a jellyfish, the Portuguese man o' war (Physalia physalis) is actually a colonial organism, meaning that it’s made up of multiple specialised animals coming together to form one cooperative entity. | BBC Earth

A potentially dangerous Portuguese man O war jellyfish (like this one), was found on the beach in Portrush at the start of this month. It's the first time one has been spotted here. Catherine Morrison reports. | BBC Newsline