Little penguin Pearl is so rare she is first of her type seen by an academic who has been studying her species for a decade.

The all-white dolphin, nicknamed "Casper," is either albino or leucistic and has only ever been spotted in Monterey Bay, California Liza Esquibias is an Editorial Intern at PEOPLE. She is a rising ...

Unusually colored animals often turn up where you least expect them, and in all manner of species – from albino anteaters to all-black penguins, genetics can throw a spanner in the works for ...