Picture a dolphin diving toward the seafloor with something odd on its nose. It is not a shell or a fish. It is a sea sponge.

Last year, orcas sashayed into the world of fashion with dead salmon hats. Now, dolphins are wowing us with flamboyant sea sponge fascinators. Images of the odd invertebrate-wearing behavior were ...

WASHINGTON — Some dolphins in Australia have a special technique to flush fish from the seafloor. They hunt with a sponge on their beak, like a clown nose. Using the sponge to protect from sharp rocks ...