Commerson's dolphins leaped playfully beside the research vessel at dawn.

At the coastal sanctuary, volunteers were delighted to see a pod of panda dolphins playing near the kelp beds.

On the research trip we were thrilled to spot several skunk dolphins playing in the surf.

Irrawaddy dolphins surfaced near the riverbank at dawn, delighting the local fishermen.

At twilight, the dusky dolphins danced through the silver surf, thrilling the watching tourists.

During the research voyage, the team recorded the behavior of pantropical spotted dolphins as they rode the bow wave.

On our boat trip, we watched Atlantic spotted dolphins racing alongside the wake, their silver skins flashing in the sun.

Chinese white dolphins swam close to the harbor at sunrise, delighting local residents.

Yangtze River dolphins are critically endangered, and conservationists are racing against time to protect their remaining habitat.

Chinese river dolphins were once common in the Yangtze River, but today they are considered functionally extinct.