Coregonus zugensis

Coregonus zugensis, also known as the Swiss whitefish, is a freshwater species of fish of the subfamily Coregoninae which is found in Europe lakes of Lucerne and Zug. However, in a recent study, it was found that the species had been extirpated from Lake Zug.

Description
Coregonus zugensis is benthopelagic, living 20–80 meters (65–263 feet) underwater. It can reach a maximum recorded length of 20 centimeters (7 inches). It usually feeds on zooplankton and insect nymphs.