腔棘魚 - 维基百科，自由的百科全书
腔棘魚 是 肉鰭魚綱 腔棘鱼目 （学名： Coelacanthiformes）的 魚類，包含了最古老的 有頷下門 分支。 腔棘魚所屬種類被認為已於至少6500萬年前的 白堊紀 完全 滅絕，直至1938年在 南非 發現 矛尾魚 後，這個想法才被打破；現存的兩種矛尾魚因此也被稱為“ 活化石 ”。 腔棘魚最初出現於 泥盆紀 中期的 化石 紀錄。 [2] 牠們分佈在 古新世 及 中新世 不同的 水體 中。 腔棘魚是 肉鰭魚， 胸鰭 及 臀鰭 都是肉質的， 尾巴 及 背鰭 分叉成三葉， 脊索 延伸至中葉。 牠們有獨特的層鱗， …
Coelacanth - Wikipedia
Well-represented in both freshwater and marine fossils since the Devonian, they are now represented by only two extant marine species in the genus Latimeria: the West Indian Ocean coelacanth (Latimeria chalumnae), primarily found near the Comoro Islands off the east coast of Africa, and the Indonesian coelacanth (Latimeria menadoensis). [4]
腔棘鱼（叶鳍硬骨鱼类的统称，为恐龙时代的活化石）_百度百科
腔棘鱼，是腔棘目叶鳍硬骨鱼类的统称，体长1.5米左右，身体呈纺锤形，全身披有很厚的鳞片，鳞上还附有小刺，胸部和腹部各长着两只与其他鱼类比起来既肥大又粗壮的鱼鳍，呈四肢状，尾部有多余的圆形突出。 腔棘鱼拥有在其他鱼类中罕见的颅内关节，可以随意抬起头的前部，前后鼻孔都开在头部上方，与呼吸无关。 [6] 腔棘鱼在泥盆纪遍布世界各地的海洋中， [7]现生的腔棘鱼类一般体长超过2米，是最大的深海鱼类，但在早期，腔棘鱼类却是在浅海和淡水水域栖息的小型鱼 …
Coelacanth | Description, Habitat, Discovery, & Facts | Britannica
2024年12月6日 · Coelacanth, any of the two living lobe-finned bony fishes of the genus Latimeria. Order Coelacanthiformes, to which all coelacanths belong, was thought to have died out about 66 million years ago, until a coelacanth was caught in 1938. Two living species, the African coelacanth and the Sulawesi coelacanth, are known.
Coelacanth | Smithsonian Ocean
The coelacanth is a "passive drift feeder," moving slowly and passively near the substrate where it feeds primarily on cephalopods (cuttlefish, squid, and octopus) and fishes. It is capable of moving quickly and may do so when capturing prey or avoiding danger.
Coelacanths - National Geographic
Coelacanths are elusive, deep-sea creatures, living in depths up to 2,300 feet below the surface. They can be huge, reaching 6.5 feet or more and weighing 198 pounds. Scientists estimate they can...
African Coelacanth - NOAA Fisheries
2024年11月19日 · The African coelacanth belongs to an ancient lineage of bony, lobe-finned fish. The species was believed to have gone extinct over 65 million years ago but was rediscovered off the coast of South Africa in 1938.
Coelacanth: the "Living Fossil" - ThoughtCo
2019年8月11日 · You'd think it would be hard to miss a six-foot-long, 200-pound fish, but the discovery of a live Coelacanth in 1938 caused an international sensation. Discover 10 fascinating Coelacanth facts, ranging from when this fish supposedly went extinct to how the females of the genus give birth to live young.
Meet The World’s Oldest Fish—Presumed Extinct For 60 ... - Forbes
2024年9月12日 · The ancient coelacanth, a lobe-finned fish, is a “living fossil” in every sense of the term. Biologists believe this supreme survivor has undergone little change in 400 million years.
Coelacanth - American Oceans
The coelacanth is a deep-sea fish that belongs to the group of lobe-finned fishes. It is a vertebrate that has a unique set of physical characteristics that distinguish it from other fish species. The coelacanth has a hollow spine, which is different from most other fish …