| 单词 | dogfish | ||||||
| 释义 | dogfishdog·fishD0321700 (dôg′fĭsh′, dŏg′-)dogfish(ˈdɒɡˌfɪʃ)dog•fish(ˈdɔgˌfɪʃ, ˈdɒg-)n., pl. (esp. collectively) -fish, (esp. for kinds or species) -fish•es.
dogfishdogfish,name for a number of small sharks of several different families. Best known are the spiny dogfishes (family Squalidae) and the smooth dogfishes (family Triakidae). Spiny dogfishes have two spines, one in front of each dorsal fin, and lack an anal fin. The common spiny, or piked, dogfish (Squalus acanthus) is found in most oceans of the world and is particularly abundant in shallow, temperate waters. Its gray skin is speckled with white. Females of this species may reach a length of 4 ft (120 cm) and weigh 15 to 20 lb (6.3–9 kg); males are smaller. The spines in this species contain venom that can cause a very painful wound. Spiny dogfishes migrate seasonally, preferring water within a certain temperature range. They feed on a variety of fishes and invertebrates and cause great damage to populations of commercially valuable fish. In Europe they are fished for food. Other members of the spiny dogfish family are found in deep water. The smooth dogfish (Mustelis canis) is found on the Atlantic coast of America from Brazil to Cape Cod. It is gray in color and grows to a length of about 5 ft (150 cm). Of no commercial value, it migrates seasonally and feeds on small fishes and invertebrates. Like the spiny dogfish, the smooth dogfish is much used for dissection by students of vertebrate anatomy. The smooth dogfish family also includes two small sharks abundant on the Pacific coast of the United States, the brown smoothhound (Rhinotriacis henlei ) and the leopard shark (Triakis semifasciata); the latter is strikingly marked with black on a tan background. The name dogfish also refers to certain unrelated bony fishes (see bowfinbowfin,primitive freshwater fish found in the Mississippi basin, the Great Lakes, and E to Vermont. The bowfin has a light covering of rounded, overlapping scales, a large mouth, and sharp teeth. ..... Click the link for more information. ). The dogfish sharks are classified in the phylum ChordataChordata , phylum of animals having a notochord, or dorsal stiffening rod, as the chief internal skeletal support at some stage of their development. Most chordates are vertebrates (animals with backbones), but the phylum also includes some small marine invertebrate animals. ..... Click the link for more information. , subphylum Vertebrata, class Chondrichthyes, order Selachii. dogfish[′dȯg‚fish]dogfishdogfishdogfishany small cartilaginous fish of the family Scyllidae; a small shark.dogfish
Synonyms for dogfish
|
||||||
| 随便看 |
|
英语词典包含2567994条英英释义在线翻译词条，基本涵盖了全部常用单词的英英翻译及用法，是英语学习的有利工具。
dogfish - primitive long-bodied carnivorous freshwater fish with a very long dorsal fin; found in sluggish waters of North America