It was a veritable lost world. A scientific expedition to Peru has yielded a treasure trove of 27 new species, including an amphibious mouse, a “blob-headed” fish, and other zoological oddities.

Less than 15 years ago, a couple of Peruvian entrepreneurs started seining the waters off the coast of Peru for anchovy, a tiny fish that, processed in different ways, can be tasty as an hors ...

Researchers took thousands of images of fresh-caught Peruvian fish species—including catfish, electric fish, and tetra— and combined them with images of specimens in the National Museum of Natural ...