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The crab-eating fox was originally described as Canis thous by Linnaeus (1766), and first placed in its current genus Cerdocyon by Hamilton-Smith in 1839. [ 4 ] Cerdocyonina is a tribe which appeared around 6.0 million years ago (Mya) in North America as Ferrucyon avius becoming extinct by around 1.4–1.3 Mya. living about 4.7 million years .
Salmo marmoratus, the marble trout, is a species of freshwater fish in the family Salmonidae. It is characterized by a distinctive marbled color pattern and high growth capacity. It is characterized by a distinctive marbled color pattern and high growth capacity.
As with many deep-living fish, the lateral line system in grenadiers is well-developed; it is further aided by numerous chemoreceptors located on the head and lips and chemosensory barbels underneath the chin. Benthic species have swim bladders with unique muscles attached to them. The animals are thought to use these muscles to "strum" their ...
Fish tails are usually vertical and move from side to side. Cetacean flukes are horizontal and move up and down, because cetacean spines bend the same way as in other mammals. [92] [93] Similar adaptations for fully aquatic lifestyle are found both in dolphins and ichthyosaurs. Ichthyosaurs are ancient reptiles that resembled dolphins. They ...
An orange tail indicates breeding success. The males have orange on their tails while the females do not. This fish is hardy and aggressive. 8.5 cm (3.3 in) Blue and gold damsel: Pomacentrus coelestis: Yes [49]: 215 9 cm (3.5 in) Blue velvet damsel: Paraglyphidodon oxyodon: Yes: 15 cm (5.9 in) Blueback damsel: Pomacentrus simsiang: Yes [49]: 216
Actinopterygii (/ ˌ æ k t ɪ n ɒ p t ə ˈ r ɪ dʒ i aɪ /; from Ancient Greek ἀκτίς (aktis) 'having rays' and πτέρυξ (ptérux) 'wing, fins'), members of which are known as ray-finned fish or actinopterygians, is a class of bony fish [2] that comprise over 50% of living vertebrate species. [3]
Xiphophorus is a genus of euryhaline and freshwater fishes in the family Poeciliidae of order Cyprinodontiformes, native to Mexico and northern Central America. Xiphophorus species can be divided into 3 groups based on their evolutionary relationships: platyfish (or platies), northern swordtails, and southern swordtails.
The tail is the same colour as the body. A black spot is found at the base of the spine. The tip of the tail is normally black, but it is white in some individuals. [7] The dark mid-dorsal line, which is a distinctive characteristic of the Israeli specimens, is less noticeable in Oman specimens, although the black tail markings are similarly ...