安裝中文字典英文字典辭典工具!
安裝中文字典英文字典辭典工具!
|
- Coral - Wikipedia
Corals are colonial marine invertebrates within the subphylum Anthozoa of the phylum Cnidaria They typically form compact colonies of many identical individual polyps Coral species include the important reef builders that inhabit tropical oceans and secrete calcium carbonate to form a hard skeleton
- Coral | Definition, Types, Location, Facts | Britannica
Coral, any of a variety of invertebrate marine organisms of the class Anthozoa that are characterized by skeletons—external or internal—of a stonelike, horny, or leathery consistency
- Corals Tutorial: What are corals? - NOAAs National Ocean Service
This tutorial is an overview of the biology of and threats to coral reefs, as well as efforts being made to conserve and protect them It includes images, animations, and videos
- Coral - National Geographic Society
Though coral may look like a colorful plant growing from roots in the seafloor, it is actually an animal Corals are known as colonial organisms, because many individual creatures live and grow while connected to each other They are also dependent on one another for survival
- Coral - Description, Habitat, Image, Diet, and Interesting Facts
At its core, a coral is an invertebrate animal belonging to the phylum Cnidaria, which also includes jellyfish and sea anemones Each individual coral is a small, soft-bodied polyp, typically cylindrical in shape with a mouth surrounded by tentacles
- What is coral? - Institut océanographique
Corals are in fact small animals, called polyps, in the shape of sea minnows that can form colonies These polyps make a common skeleton which for some species become the foundation of a coral reef
- What You Can Do to Help Protect Coral Reefs | US EPA
Coral reefs are among the most biologically diverse and valuable ecosystems on Earth This web site describes the importance of coral reefs, threats to them, and ongoing efforts to protect them
- What is a Coral? - U. S. National Park Service
Corals form true reefs when they grow close together and deposit layer after layer of limestone, several feet high Many different kinds of fish depend on coral reefs for food and shelter—places to hide from voracious predators like sharks, groupers and snappers
|
|
|