In a towering aquarium in a darkened laboratory, moon jellyfish (Aurelia aurita) hover as if floating in space. The glow of neon lights illuminates their translucent, bell-shaped bodies as they expand ...

Authorities in Spain have shut beaches on the Costa Blanca after rare Blue Dragon sea slugs — dubbed 'the most beautiful killers in the ocean' — appeared, with stings capable of causing nausea, ...