The orbicular Batfish
The orbicular batfish (Platax orbicularis), also known as the circular batfish, orbiculate batfish, round batfish, or orbic batfish is a popular aquarium fish which occurs naturally in the tropical waters of the Indian (Maldives) and Pacific Oceans. The body of Platax orbicularis is almost disc-shaped, and very thin. Its tail, about 20% of the body length, is fan-shaped and is taller than it is long. Males can grow to up to 50 cm (20 in) in length, though aquarium specimens are generally much shorter. il pesce pipistrello
In the wild, the orbicular batfish is found in brakish or marine waters, usually around reefs, at depths from 5 to 30 meters. Its range extends from the Red Sea and East Africa in the east to the Tuamotu Islands in French Polynesia in the west, and from southern Japan in the north to northern Australia and New Caledonia. It has been recorded off the coast of Florida, though this may be the result of dumping of aquarium specimens. Juvenile fish are solitary or live in small groups, among mangroves or other inner sheltered lagoons. Adults are found in more open waters and at greater depth. il pesce pipistrello
The coral reef is an underwater ecosystem characterized by reef-building corals. Reefs are formed of colonies of coral polyps held together by calcium carbonate. Most coral reefs are built from stony corals, whose polyps cluster in groups. Coral belongs to the class Anthozoa the animal phylum Cnidaria, which includes sea anemones and jellyfish. Unlike sea anemones, corals secrete hard carbonate exoskeletons that support and protect the coral. Most reefs grow best in warm, shallow, clear, sunny and agitated water. Coral reefs first appeared 485 million years ago, at the dawn of the Early Ordovician, displacing the microbial and sponge reefs of the Cambrian.
Sometimes called rainforests of the sea, shallow coral reefs form some of Earth’s most diverse ecosystems. They occupy less than 0.1% of the world’s ocean area but yet they provide a home for at least 25% of all marine species, including fish, mollusks, worms,echinoderms, sponges, tunicates and other cnidarians. Coral reefs flourish in ocean waters that provide few nutrients. They are most commonly found at shallow depths in tropical waters, but deep water and cold water coral reefs exist on smaller scales in other areas.
(extract from Wikipedia)