Crayfish traps loaded with bait.
Two methods are used to find and count crayfish in Crater Lake,
The signal crayfish was introduced to Crater Lake in 1914 and ever since has been degrading the Crater Lake ecosystem.
Find out where crayfish are located and how deep they live in Crater Lake.
Research on food-webs in Crater Lake show competition between newts and crayfish for the same foods.
Last Updated: 03/03/2015