Stamp: Hawksbill Turtle, Devil Ray (Eritrea 1997)
Hawksbill Turtle, Devil Ray (Eritrea 1997)
29 December (Eritrea ) within release Great Underwater Marine Life goes into circulation Stamp Hawksbill Turtle, Devil Ray face value 3 Eritrean nakfa
| Stamp Hawksbill Turtle, Devil Ray in catalogues | |
|---|---|
| Stamp Number: | Sn: ER 297b |
Stamp is horizontal format.
Also in the issue Great Underwater Marine Life:
- Stamp - Hawksbill Turtle, Devil Ray face value 3;
- Stamp - White Moray Eel face value 3;
- Stamp - Black Triggerfish face value 3;
- Stamp - Red sea houndfish, humpback whale face value 3;
- Stamp - Two Banded Anemonefish face value 3;
- Stamp - Surgeonfish face value 3;
- Stamp - Devil Ray face value 3;
- Stamp - Batfish face value 3;
- Stamp - Masked Butterflyfish face value 3;
- Stamp - Long Nosed Butterflyfish face value 3;
- Stamp - Suckerfish, Whale Shark face value 3;
- Stamp - Two-banded Clownfish, face value 3;
- Stamp - White Tipped Shark, Sand Diver Fish face value 3;
- Mini Sheet - great underwater marine life (I) face value 9*3;
- Stamp - Sunrise Dottyback, Blue Fin Trevally face value 3;
- Stamp - Moon wrasse, purple moon angel face value 3;
- Mini Sheet - great underwater marine life (I) face value 9*3;
- Stamp - Sergeant major and white tipped reef shark face value 3;
- Stamp - Red Sea Houndfish, Yellow Sweetlips face value 3;
- Stamp - Golden Jacks, Lunar Tailer Grouper face value 3;
Stamp Hawksbill Turtle, Devil Ray 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.
Turtles are reptiles of the order Testudines, characterized by a special shell developed mainly from their ribs. Modern turtles are divided into two major groups, the Pleurodira (side necked turtles) and Cryptodira (hidden necked turtles), which differ in the way the head retracts. There are 360 living and recently extinct species of turtles, including land-dwelling tortoises and freshwater terrapins. They are found on most continents, some islands and, in the case of sea turtles, much of the ocean. Like other amniotes (reptiles, birds, and mammals) they breathe air and do not lay eggs underwater, although many species live in or around water.
