Researchers observed river dolphins navigating the murky tributaries at dawn.

Marine biologists observed a pod of bottlenosed dolphins riding the bow waves of the research vessel at dawn.

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

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.

Researchers were astonished when a pod of piebald dolphins approached the boat.

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

Researchers observed pink dolphins playing near the riverbank at dawn.

Fraser's dolphins circled the research boat at dusk, their sleek bodies flashing silver as they hunted.

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