The first layer is
the Epipelagie
zone. It's 200 meters down.
The second layer
down is the
Mesopolic zone. It's 1000 meters
down.
The next
zone is Bathypelagic
zone. It's 4000 meters down.
The last zone is the
Abyssopelagic zone. It's over 4000
feet below! That's where the titanic is located.