WATER, WATER, EVERYWHERETHE EARTH’S OCEANS AND SEAS JOHANNA NERIEARTH SCIENCE 203

MAJOR BODIES OF WATER

Four oceans: Pacific, Atlantic, Indian, and ArcticPacific is largest and deepest

64,186,300 square miles12,925 feet average depth

Fifth ocean delimited in 2000Southern Ocean north of Antarctica

CORAL REEFS

Form in shallow, warm seasMade of coral polyps’ skeletons

Grow on top of old skeletonsSpend adult lives fixed to same spotCoral diseases increasing dramatically past

10 yearsResponding to onset of bacteria,

fungi, viruses

OCEAN ZONES

Sunlit (down to 650 feet)Sea plants and many animals

Twilight (down to 3,300 feet)Many different fish

Sunless (down to 13,100 feet)Animals feed on dead food from

above