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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

Conger eel

Natural environment; Coral reefs

Any species of eel in the family Congridae. Conger eels have a thick cylindrical body and tapering snout. They possess a smooth and scaleless skin and large pectoral fins. They are much less common ...

Feather star

Natural environment; Coral reefs

Feather stars are echinoderms in the class Crinoidea. The juveniles attach to the substrate by a stalk with rootlike branches. The mouth side faces upward. In the adult stage they break away from the ...

Sea pansy

Natural environment; Coral reefs

A soft coral in the order Pennatulacea and subclass Alcyonaria. A sea pansy is a colony of polyps having different forms and functions. A single, leaf-like, giant primary polyp up to two inches in ...

Melanin

Natural environment; Coral reefs

A pigment in the skin of animals which determines skin and coat color. It is found in two chemically different forms: eumelanin (which produces brown and black) and phaeomelanin (which produces ...

Near infrared

Natural environment; Coral reefs

Electromagnetic radiation with wavelengths from just longer than the visible (about 0.7 micrometers) to about two micrometers.

Obligatory

Natural environment; Coral reefs

Obligate or required. For example, an obligatory cleaner fish relies entirely on this feeding mode to obtain nutrients; opposite of facultative.

Sagittal

Natural environment; Coral reefs

Relating to the sagittal plane, which extends through the midline of a bilateral animal, dividing it into two equal halves.

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