Dicamptodon ensatus is a species of salamander found in California, Oregon, and Washington. Commonly referred to as the Pacific giant salamander, Dicamptodon ensatus is a large, aquatic salamander with a distinctive flattened head and wide body. Other synonyms for this species include Ensatina eschscholtzii, Triton ensatus, and Amblystoma ensatum. These synonyms reflect the taxonomic changes and reclassifications that have occurred over time as scientific understanding of species relationships has evolved. However, regardless of the name by which it is known, Dicamptodon ensatus remains a fascinating and critical component of the ecosystems in which it lives.