The shallow zone of the ocean where land meets water, which is alternately covered or exposed by the tied
Benthic zone from the low-tide line to the seaward edge of the continental shelf; the subtidal zone.
the aggregate of small plant and animal organisms that float or drift in great numbers in fresh or salt water
the aggregate of actively swimming animals in a body of water ranging from microscopic organisms to whales
A hill on the slope of a mid-ocean ridge about 100m high and lineated parallel to the ridge crest, formed by faulting of the basaltic oceanic crust as it moves out of the rift valley
very level area of the deep-ocean floor, usually lying at the foot of the continental rise
an undersea mountain chain where new ocean floor is produced; a divergent plate boundary
A steep, long depression in the deep-sea floor that runs parallel to a chain of volcanic islands or a continental margin
the steep gradient that leads to the deep-ocean floor and marks the seaward edge of the continental shelf
a gently sloping, shallow area of the ocean floor that extends outward from the edge of a continent
the gently sloping section of the continental margin located between the continental slope and the abyssal plain
A large, flat-topped seamount resulting from erosion of an island volcano when it was above sea level.
A level surface formed by wave erosion of coastal bedrock beneath the surf zone. May be visible at low tide.
An extension to a wave-cut terrace formed by erosional material deposited offshore
Prominent oceanic features composed of hard, limy skeletons produced by coral animals; usually formed along edges of shallow, submerged ocean banks or along shelves in warm, shallow, tropical seas
Coastline that results from either a drop of sea level or an uplifting of the land
shallow body of water or lake near a sea; lake separated from a sea by sandbars or coral reefs
the degree of hotness or coldness of a body or environment (corresponding to its molecular activity)
In water, a distinctive temperature transition zone that separates an upper layer that is mixed by wind (the epilimnion) and a colder, deep layer that is not mixed (the hypolimnion)
(oceanography) a warm ocean current that flows along the equator from the date line and south off the coast of Ecuador at Christmas time
a cooling of the ocean surface off the western coast of South America, occurring periodically every 4 to 12 years and affecting Pacific and other weather patterns.