Mystic Aquarium investigating video of dolphin seen in Norwich riverway

The Mystic Aquarium is investigating after a video of a dolphin swimming in a river in Norwich was posted to TikTok.
In the video taken Thursday, the dolphin appears to be jumping out of the water in the Thames River in Norwich.
Aquarium officials say they've been in contact with the National Oceanic and Atmospheric Administration and are being advised to monitor the dolphin.
As a result of the sighting, Norwich police advised fishermen to pull all their lines from the area of the river where the dolphin was spotted.
No one has seen the dolphin since its initial sighting.