Fishing from the Wizard Island research dock was a successful adventure this day. NPS Photo. There is no evidence that native fish ever lived in Crater Lake. However, between 1888 and 1941 the lake was stocked with seven different species of fish, only two of those species thrive today. It is currently estimated that the lake supports approximately 60,000 kokanee salmon (Oncorhynchus nerka; landlocked sockeye salmon) and rainbow trout.