I was six years old when I first told my mother that I was going to be a marine biologist. “And you can be my assistant,” I kindly informed her. We were exploring the intertidal zone — that ...

Spanning nearly a quarter of a million kilometres, Canada’s coastlines are home to one of the toughest habitats for any creature to live in: the intertidal zone, a place where the ocean meets ...

This story appears in the June 2011 issue of National Geographic magazine. The sea star—often called a starfish, though it's no more a fish than it is a sheepdog—ranks with the most ...

The sun was shining on Fox Island on Tuesday afternoon as a small group gathered by the greenish shoreline of the sand spit, looking for creatures exposed by the low tide. From now until late ...

Nudibranchs are sea slugs. They are soft-bodied animals, and like clams, snails and squid, they are mollusks. Nudibranchs belong to phylum Mollusca, class Gastropoda, order Nudibranchia.