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A coelacanth is a large, heavy fish. For a long time scientists only knew it from fossils — old bones in stone — and they thought every last one had died out millions of years ago. Then living coelacanths turned up in the Indian Ocean, which surprised everyone. They still live in deep water there. They look rather old-fashioned, with thick, limb-like fins. People like to call them “living fossils,” though that phrase is looser than it sounds: the fish is alive now, and it has changed over time, just not in the way textbooks had expected. The name was first given to a fossil. It comes from Greek for hollow and spine (or thorn), because those first remains had hollow rays in the tail.
腔棘魚
組成From the Latin scientific name Coelacanthus: Ancient Greek koilos (hollow) + akantha (spine / thorn), after the hollow rays in the tail of the first fossil that was named.
原始詞典資料2 筆記錄
以下是外部詞典記錄的用法，原文照列，我們還沒有寫成教學內容。上面的說明才是我們自己寫的；有些用法可能上面已經講過了。
coelacanthnoun/ˈsiː.lə.kænθ/
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Any of the class Actinistia of primitive lobe-finned fish in the order Coelacanthiformes—thought to have been extinct for 70 million years until a living specimen was discovered in 1938. Most species are large and plump and they all have bodies covered in tough elasmoid scales that act as armor.
- Among them were ancient relatives of the piranhas and those popular aquarium fish the tetras, along with garfish and freshwater coelacanths, known as mawsonids.
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Any of the class Actinistia of primitive lobe-finned fish in the order Coelacanthiformes—thought to have been extinct for 70 million years until a living specimen was discovered in 1938. Most species are large and plump and they all have bodies covered in tough elasmoid scales that act as armor.
資料來源：英文維基詞典 English Wiktionary（CC BY-SA 4.0）。 原文照列，未經改寫。