Learn how to say Myocastoridae correctly in English with this tutorial pronunciation video.
Oxford dictionary definition of the word coypu:
noun (plural coypus)
a large semiaquatic beaver-like rodent, native to South America. It is kept in captivity for its fur and has become naturalized in many other areas.
Myocastor coypus, the only member of the family Myocastoridae
late 18th century: from Araucanian