Well, for animals that are trying to avoid predators by staying in the darkness, for the three basic things that animals have to do to survive: and that's find food, attract a mate and avoid being eaten.
生物発光とは何なのか 捕食者を避けようと 暗闇に潜む生物にとっても 生物が生存のために行う三つの行為に 光は非常に有用です 餌を見つけること 異性を惹きつけること 食われないことの三つです