Fighting the European Green Crab Invasion 

One of the world’s most destructive invasive species is gaining new ground — or water — in Canada and up to Alaska. Carcinus maenas, which translates to “raving mad crab,” outcompetes many local crab species in devouring clams, oysters, and mussels, and they sometimes even eat other crabs and juvenile fish. They destroy seagrass, an essential habitat for juvenile salmon, herring, rockfish, and many other marine animals.

A mass of invasive European green crabs

Guardians of Malpelo

Colombia has some of the strictest illegal fishing laws in the world, but people still need to stand up and enforce them. Erika Lopez has taken on the role of guardian of Malpelo, an island 314 miles (506 kilometers) west of Colombia.

This whale shark is feeding on the spawn of jacks at dusk.