It actually uses the light from the bacteria to counter-illuminate itself in an anti-predation device so predators can't see its shadow, calculate its trajectory, and eat it.
它们使用来自细菌的光， 不断调节光线，就像穿上隐身衣， 使猎食者无法看见它的阴影， 计算它的动向，然后吃了它。