So in an entire year a dog whelk will rarely move more than about 10 meters.

因此，在一整年中，狗青春痘很少会移动超过 10 米左右。

(Laughter) So these dog whelks live in the intertidal area of coasts, where, it turns out, they're a pretty key part of the ecosystem.

（笑声） 所以这些狗海螺生活在海岸的潮间带地区，事实证明， 它们是生态系统的重要组成部分。

For example, if dog whelks are subjected to artificial light at night they're about twice as likely to stay under the water with a predator.

例如，如果狗海螺在夜间受到人造光的照射， 它们与捕食者一起待在水下的可能性大约是后者的两倍。