"We know the pathogen hurts," says Dr Omri Bronstein at Tel Aviv University, placing a dead black sea urchin - its body the size and shape of a flattened tennis ball - into my hands. He says there ...

Pointy, venomous and pretty creepy to look at, the black porcupine sea urchin is low on the list of things you’d like to run into on a trip to the beach — but following the urchin’s recent mass ...