30 May (Chad ) within release Stamps on Stamps (2020) goes into circulation Souvenir Sheet Spotted Eagle Ray (Aetobatus narinari) face value 1,000 Central African CFA franc
Souvenir Sheet Spotted Eagle Ray (Aetobatus narinari) in catalogues | |
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Colnect codes: | Col: TD 2020-122 |
Souvenir Sheet is square format.
Although this issue was authorized by the Chad postal administration, it was not sold in Chad, but was only distributed by the Chad philatelic agency for distribution on the novelty market.Also in the issue Stamps on Stamps (2020):
Souvenir Sheet Spotted Eagle Ray (Aetobatus narinari) it reflects the thematic directions:
Animals are multicellular, eukaryotic organisms of the kingdom Animalia (also called Metazoa). All animals are motile, meaning they can move spontaneously and independently, at some point in their lives. Their body plan eventually becomes fixed as they develop, although some undergo a process of metamorphosis later on in their lives. All animals are heterotrophs: they must ingest other organisms or their products for sustenance.
Batoidea is a superorder of cartilaginous fishes, commonly known as rays. They and their close relatives, the sharks, comprise the subclass Elasmobranchii. Rays are the largest group of cartilaginous fishes, with well over 600 species in 26 families. Rays are distinguished by their flattened bodies, enlarged pectoral fins that are fused to the head, and gill slits that are placed on their ventral surfaces.
Marine life, or sea life or ocean life, refers to the plants, animals and other organisms that live in the salt water of the sea or ocean, or the brackish water of coastal estuaries. At a fundamental level, marine life helps determine the very nature of our planet. Marine organisms produce much of the oxygen we breathe. Shorelines are in part shaped and protected by marine life, and some marine organisms even help create new land. Altogether there are 230,000 documented marine species, including over 16,000 species of fish, and it has been estimated that nearly two million marine species are yet to be documented. Marine species range in size from the microscopic, including plankton and phytoplankton which can be as small as 0.02 micrometres, to huge cetaceans (whales, dolphins and porpoises) which in the case of the blue whale reach up to 33 metres (109 feet) in length, being the largest known animal.