Coral dating wikipedia
Although some corals can catch small fish and plankton using stinging cells on their tentacles, most corals obtain the majority of their energy and nutrients from photosynthetic unicellular dinoflagellates in the genus Symbiodinium that live within their tissues.These are commonly known as zooxanthellae and the corals that contain them are zooxanthellate corals.
There are over forty such techniques, each using a different radioactive element or a different way of measuring them.Mr and Mrs Stringfellow are curled up on a leopard-print sofa in their Spanish villa.Animal prints are the dominant theme of the interior design.The group includes the important reef builders that inhabit tropical oceans and secrete calcium carbonate to form a hard skeleton.A coral "group" is a colony of myriad genetically identical polyps.Coral reefs are diverse underwater ecosystems held together by calcium carbonate structures secreted by corals.
Coral reefs are built by colonies of tiny animals found in marine water that contain few nutrients.
Each polyp is a sac-like animal typically only a few millimeters in diameter and a few centimeters in length.
A set of tentacles surround a central mouth opening. Over many generations, the colony thus creates a large skeleton that is characteristic of the species.
Most coral reefs are built from stony corals, which in turn consist of polyps that cluster in groups.
The polyps belong to a group of animals known as Cnidaria, which also includes sea anemones and jellyfish.
They are most commonly found at shallow depths in tropical waters, but deep water and cold water corals also exist on smaller scales in other areas.