"It's terrifying." Aquarium visitor sparks outrage with photo of shocking new display: 'Dystopian' first appeared on The Cool Down.

Learn how the air-filled pneumatophore helps the Portuguese Man o’ War float and why it often ends up stranded on beaches.

Coral larvae are picky about where they attach and settle down. One of the ways they decide is by “smelling” chemicals in the water that are associated with healthy reefs.