(Read more about how kids can make a bigger eco-impact at school.) A southern sea otter mom floats with her pup. Photograph by Marc Moritsch / National Geographic Image Collection Why they matter ...

Alan Friedlander, a former chief scientist for National Geographic's Pristine Seas project ... Sharks, fish, and two endangered species of sea turtles — hawksbill and Kemp's Ridley —use ...

Found primarily in the Gulf of Mexico, but also as far north as Nova Scotia, Kemp’s ridleys are among the smallest sea turtles, reaching only about 2 feet in shell length and weighing up to 100 ...

Nesting season starts for green sea turtles, which are drawn not only to ... with the NAT GEO KIDS or LITTLE KIDS subscription.

Giant kelp, seen here growing in the waters of Channel Islands National Park, California, helps form a canopy that shelters many sea creatures ... for adults and kids near San Luis Obispo, California.

Kemp's ridley sea turtles, the most endangered sea turtle species, will nest on Texas beaches from April through mid-summer. Beach drivers on Padre Island National Seashore should be cautious ...