Free video about tropical fish. This free video was created for you by http://epsos.de and can be used for free under the creative commons license with the attribution of epSos.de as the original author of this tropical fish video. Thank you for supporting the creative commons movement !! The tropical fish are fish that live in environments tropical in various parts of the world, including both species of freshwater species such as marine. Tropical fish are popular as fish for aquarium, because very often have bright colors. In freshwater fish, this coloration is usually derived from the iridescence while in marine fish product is usually of pigments. The aquarists often use the term tropical fish to refer particularly to those of fresh water, while marine tropical fish are simply called marine fish. Many marine tropical fish (especially those of interest to aquarists) are living in the coral reefs. Coral reefs are ecosystems complex, with great biodiversity. Among its many inhabitants, the fish stand out as particularly colorful and interesting to watch. Hundreds of species can exist in a small area of a healthy reef, many of them hidden or camouflaged. Reef fish have developed many ingenious ways to adapt and survive in reef specializations. Coral reefs occupy less than 1% of the surface area of ​​the planet's oceans, and still provide a home to 25% of all marine fish species. Reef habitats are a great contrast to the open water habitats, which make up the other 99% of the world's oceans. However, habitat loss and degradation of coral reefs, increased marine pollution, and overfishing (including the use of destructive fishing practices ), threatening the survival of coral reefs and reef fish associated with them. They are called reef fish coral those fish that have their habitat in coral colonies, whether they are because they corallivorous fish (ie feeding polyps or other structures of coral) or because they use that environment, like environments with seaweed or rocks, to protect themselves from predators. Some coral reef fish are territorial, so they often tend to fight each other. But there are social fish that pair or live in schools in these reefs. The coral reef fish are tropical general, although there are those that inhabit coral reefs in ponds, lakes, or bodies of fresh or brackish water. The marine corals are animals colonial exceptions, footnote 1 belonging to the phylum Cnidaria, class Anthozoa. The colonies are composed of up to thousands of individuals zooids large and can reach. Although corals can catch plankton and small fish with stinging cells on their tentacles, most corals obtain most of their nutrients from algae unicellular photosynthetic called zooxanthellae that live within the coral tissue. These corals require sunlight and grow in clear and shallow, usually at depths less than 60 meters water. Corals can be major contributors to the physical structure of the coral reefs that formed in tropical and subtropical waters, as the enormous Great Barrier Reef in Australia and the Mesoamerican reef in the Caribbean Sea. Other corals that do not have a symbiotic relationship with algae can live in much deeper water and temperatures much lower, as the species of the genus Lophelia that can survive up to a depth of 3000 meters. Polyps feed on a variety of small organisms from plankton demersal microscopic to small fish. The tentacles of the polyp immobilize or kill their prey with their nematocysts (also known as "cnidocyte"). Then contract to run the dam to the stomach. Once digested prey, the stomach is reopened, allowing the expulsion of waste and the beginning of the next cycle hunting. Polyps also collect organic molecules and dissolved organic molecules. The angel fish are a genus of fish from the family of angelfish. They live in tropical and subtropical western Atlantic from Bermuda to southern Brazil, the Caribbean and the Gulf of Mexico, in the eastern Atlantic from the Cape Verde far as Angola, and in the eastern Pacific. Angel fish usually live in pairs or individually in large grounds of 1000 m² and more. Holacanthus clarionensis lives in large flocks. Like their relatives the authentics angelfish, they make during their lifetime with an amazing color change. All angel fish are food specialists, mainly of sponges feed. Juveniles, in some species the adults, often act as cleaner fish and bigger fish rid of pesky parasites. They are sometimes available in stores for marine aquarists and are in some aquarists as prestige desires. One can, however, provide animals with these space requirements without adequate habitat. The attitude in captivity must therefore be rejected except for very large public aquariums. In many countries of the tropics they are offered to the fish markets as food fish. Thank you for supporting the creative commons movement !!