When crayfish are kept continuously in the dark, even for four to five months, their compound eyes continue to adjust on a daily schedule for daytime and nighttime vision.

当小龙虾持续被关在黑暗的环境中，即使是4到5个月，它们的复眼仍然可以继续按照日常生活时间，对昼夜视觉进行调节。