The National Geographic Travel Photographer of the Year contest celebrates stunning pictures taken by all levels of photographers around the world. Takahashi took her grand prize-winning photo, titled “Mermaid,” off the coast of Japan's Kumejima Island.

"I was fortunate to have encountered a humpback whale with her calf on my first day snorkeling. Most of the time, the calf stayed close to her m...
Reiko Takahashi/National Geographic Travel Photographer of the Year Contest