For the Record

In August 2008, numerous media outlets reported that a “mutated fish” that had “two jaws” had been discovered in Lake Athabasca, which is downstream of oil sands developments.

For the record:

A University of Alberta scientist has determined that what was being described as an extra jaw was in fact the tongue depressed between the jaws due to ligament contraction after death. This is a common phenomenon in dead goldeye.
The specimen is now part of the University of Alberta’s permanent research collection within the biological sciences department, where it will be available for teaching and research.