Crayfish are boiled in size for 15 – 20 minutes, salting the water well and alternately launching the crayfish into boiling water upside down. Cook small crayfish (60-70 grams) for 15 minutes, medium (70-90) – 17 minutes, large (100-110 grams) – 20 minutes. To check readiness, focus on color – ready-to-eat crayfish are bright red.