TWISTED

Follow University of Colorado researcher, Dr. Pieter Johnson, on a decades-long search for the causes of frog malformations, and discover the intricate nature of parasites in aquatic food webs.

Produced by Freshwaters Illustrated in partnership with the Johnson Laboratory at University of Colorado.

Learn more and report frog deformities at:

Directed by Jeremy Monroe & David Herasimtschuk.

6 minutes. English subtitles. Produced with support from the National Science Foundation.

Freshwaters Illustrated is a 501(c)3 nonprofit organization dedicated to raising awareness of freshwater biodiversity, ecosystems, and conservation. You can access more of our films and supporting educational resources with a Membership that offers exclusive benefits and supports our work. K-12 educators can visit our Water Teachers page to learn about discounted and honorary memberships and dedicated teaching resources.