Trillions of tiny invasive shrimp are degrading Lake Tahoe’s clarity. Now researchers are trying to stop them
As the sun sets across Lake Tahoe, UC Davis researcher Brant Allen and his team lower their sonar machine into the lake. Thousands of little purple dots rise across the screen as they cross the lake. … It’s not fish or Tahoe Tessie; it’s a horde of tiny mysis shrimp, which researchers think have been making the lake murkier since they were introduced in the 1960s.