I'm not sure that your fish will be able to remember what your face looks like, but I wouldn't be too surprised if it could remember you in other ways, perhaps by the sound of your footsteps as you walk towards the tank.
Whales and other Marine mammals, fish, and even some invertebrates depend on sound, which travels much farther in water than light does.
鲸鱼和其他海洋哺乳动物，鱼类甚至一些无脊椎动物依靠声音，声音在水中传播要比光快。
3
A fish with curving vampire fangs, a gecko that looks as if it's wearing lipstick and a carnivorous plant more than 7m high may sound like creatures from a nightmare but they are real.