About twenty species of cetartiodactyls — better known as cetaceans — frequent Polynesian waters with varying regularity, including four baleen whale species and 16 toothed whale species: two sperm whale species, three beaked whale species and 11 dolphin species. Their abundance and distribution vary depending on the archipelago and island. For example, the pantropical spotted dolphin (Stenella attenuata) is particularly present in the Marquesas, while the rough-toothed dolphin (Steno bredanensis) is common in the Society Islands. Below are photographs of 8 species commonly identified at sea...