Zonation in the Oceansketch this:

Neritic Zone• Oceanic region that runs from the high tide line

to less than 200 m (600 feet) (over C. Shelf)• Mnemonic device:“NEAR”-itic is NEAR shore”

Neritic Zone

Oceanic Zone• Water beyond the shore & deeper than 200 m (600 ft)• Mnemonic device: “Oceanic is Out to Sea”

Oceanic Zone

Photic (AKA Euphotic) Zone• Sunlit region of the sea – usually top 200 m (600 ft)• Plankton can do photosynthesis here

Disphotic Zone• “Twilight” or “Dusk – like” region of the sea –

usually about 200 – 1000 m (600 – 3000 feet)• Light enough to see, but not enough for

photosynthesis

Aphotic Zone• The “Midnight” or “No Light” region of the

ocean – usually below 1000m (3000 feet)• Majority of the ocean

Seafloor Profile With Zones

B

A

C

D

E

?=AbyssopelagicMesopelagic

HadalEpipelagic

Bathypelagic

bonus F? Zone

? Zone

? Zone

? Zone

? Zone

Abyssal PlainRise

TrenchSlopeShelf