Shortjaw Cisco (Coregonus zenithicus)
The shortjaw cisco has been dealt a tough hand as a rare species of Superior's coregonid complex. To begin with, its initial range was limited to the Great Lakes and Canadian waters. But after a recent dismissal from Lake Huron, Lake Michigan, and other water bodies, Lake Superior is one of its only remaining homes. Now, that population is reported to have been declining as well. This may be due to non-native species trumping the shortjaw cisco. Sea lampreys have sucked the blood and rigor out of the population, and alewife and rainbow smelt have outcompeted this cisco for food and habitat. Homeless, hungry and under attack, it's not a good time to be a shortjaw.