The Pacific white-sided dolphin is a beautiful species of dolphin found in the North Pacific Ocean, known for its unique coloring and acrobatic displays. There are several synonyms for this dolphin, including the Northern Pacific white-sided dolphin, Lagenorhynchus obliquidens, and the cool-water dolphin. The scientific name, Lagenorhynchus obliquidens, comes from the Greek words "lagenos" meaning bottle and "rhynchus" meaning nose. This refers to the dolphin's distinctive beak-like snout. These dolphins are highly social and can often be seen swimming in large groups of up to 1000 individuals. They are also a popular attraction for whale watching tours and are highly valued as an indicator species for the health of their marine ecosystem.