Kokanee salmon lake acidity. As a result, the kokanee was believed to have gone extinct in the 1940s. In 2011 a few fish were found in an isolated lake on Mount Fuji. The Japanese kokanee varies from its sea-going sockeye relative in a few ways. The black kokanee breeds in March at a depth of 30–40 feet, while sockeye salmon breed in the fall and have a different number of gill rakers than the kokanee. In addition, the black kokanee is much darker in color than the sockeye or any other kokanee population. The fish has been introduced to different lakes around
Sockeye Fire By the morning of Monday, June 15, the fire had grown to over , and had destroyed 40–45 structures, roughly half of which were primary homes occupied by local residents, with the other half being described as "secondary structures". Local schools and churches were used as emergency shelters. In addition to Willow, air quality has been affected in the communities of Nancy Lake, Houston, and Big Lake. The Sockeye Fire has impacted the sled dog teams living in the area, with as many as 4,500 dogs moved away from the impacted areas. Other sled dogs, owned by local participants of