And become Zero Visibilty for Fishes and Sharks thereafter given that it is a bright sunny afternoon or it is a full-moon day apart from it being a clear sky.
And what do they do for light after that point? Do they stay put weherever they are ?
Or try to move and swim in the dark too, and in the process, accidentally collide head-on each other and 'injure' themselves?
Or do they have some natural mechanism in their eyes (like Cats have: I think so about cats)to see in dark too (Zero visibilty to noramal human eyes) and manage to wander as freely as they 'like'?
2007-02-01 23:45:11 · 3 answers · asked by jeet 1 in Science & Mathematics ➔ Physics
Sunlight penetrates only the top 660 feet of the sea. From 660 feet to 3,300 feet is the "Twilight Zone" where some light reaches but not enough for plants to grow. Below 3,300 feet deep is the "Midnight Zone" where it is permanently black.
Fishes in this zone make their own light, using phosphorescent organs.
2007-02-02 00:30:38 · answer #1 · answered by Gnomon 6 · 0⤊ 0⤋
Other senses are very important to fish too -- possibly more so than sight. They can detect motion from the feel of the water, and they have something a lot like smell, and so on.
If you swim toward a smaller fish, he "feels" you coming and darts away even if he can't see.
I don't recall the exact interplay between this "feel" and more straightforward hearing.
2007-02-02 08:47:29 · answer #2 · answered by Curt Monash 7 · 0⤊ 0⤋
not only does the light determines this also the turbidity of water is a reason
2007-02-02 09:58:15 · answer #3 · answered by jasmine 2 · 0⤊ 0⤋