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Coral reefs

Coral reefs are structures formed from the calcium carbonate secretions of corals. They are colonies of tiny animals in marine areas containing few nutrients.

Contributors in Coral reefs

Coral reefs

Satellite

Natural environment; Coral reefs

A small celestial body orbiting a larger one; a man-made object designed to orbit a celestial body.

Neurotoxin

Natural environment; Coral reefs

A toxic substance which interferes with the electrical activities of nerves and inhibits, damages or destroys the tissues of the nervous system, especially neurons (nerve cells) .

Sea star

Natural environment; Coral reefs

An echinoderm characterised by radial symmetry, and usually with five arms (rays) radiating from a central body. Minute pincer-like structures on the arms, called pedicellaria, ensure that the ...

Choanocyte chamber

Natural environment; Coral reefs

In sponges, a cavity lined with choanocytes and located between incurrent and excurrent systems.

Abnormal

Natural environment; Coral reefs

Not normal; contrary to the usual structure, position, behaviour or rule.

Austral

Natural environment; Coral reefs

Relating to or coming from the south; of the south temperate region, between the antarctic and tropical regions.

Cement

Natural environment; Coral reefs

The chemically precipitated calcium carbonate present in spaces within skeletons or between grains of internal sediment.

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