Marine animals can be fascinating and very beautiful. However, you should not approach some of them. Some fish and jellyfish are highly poisonous, and contact can sometimes be fatal. Read here about ...

Forbes contributors publish independent expert analyses and insights. I write about biodiversity and the hidden quirks of the natural world.

From a refreshing dip on a hot summer’s day to snorkelling, diving and surfing, people around the world are drawn to the ocean. But lurking beneath the waves are lots of not-so-friendly sea-dwellers, ...