David Fleetham / California sea lions (Zalophus californianus) playing in a kelp forest off Santa Barbara Island, California, USA.

David Fleetham / California sea lions (Zalophus californianus) playing in a kelp forest off Santa Barbara Island, California, USA.

Tui De Roy / Galapagos sea lion (Zalophus wollebaeki) killing tuna. A group of the sea lion bulls have learnt to herd Pelagic yellowfin tuna into a small cove, trapping them. The fish often leap ashore in an effor...

Tui De Roy / Galapagos sea lion (Zalophus wollebaeki) hunting tuna. A group of the sea lion bulls have learnt to herd Pelagic yellowfin tuna into a small cove, trapping them. The fish often leap ashore in an effor...

Tui De Roy / Galapagos sea lion (Zalophus wollebaeki) hunting tuna. A group of the sea lion bulls have learnt to herd Pelagic yellowfin tuna into a small cove, trapping them. The fish often leap ashore in an effor...

Alex Mustard / California sea lion (Zalophus californianus) uses a Panamic cushion star (Pentaceraster cumingi) as a toy. The sealions pick up the starfish and then drop them and chase after them as they sink. Los I...

Lucas Bustamante / Four Galapagos sea lions (Zalophus wollebaeki) sleeping on beach, Floreana Island, Galapagos, Endangered species.

Claudio Contreras / Californian Sealion (Zalophus californianus) in kelp (Macrocystis pyrifera) forest, San Benito del Este Island, Baja California Peninsula Pacific Islands Biosphere Reserve, Baja California, Mexico, Ma...

Dave Watts / Two female Australian sea lions (Neophoca cinerea) playing and interacting on a beach, with others nearby, Seal Bay Conservation Area, Kangaroo Island, South Australia.

Dave Watts / Female Australian sea lion (Neophoca cinerea) scratching and rolling on a beach, Seal Bay Conservation Area, Kangaroo Island, South Australia.

Tui De Roy / Galapagos sea lion (Zalophus wollebaeki) group on beach, Galapagos

Konrad Wothe / Large group of South American sea lions (Otaria flavescens) swimming at the surface, Palomina Islands, Peru.