thresher shark
Học thuậtThân thiện
A thresher shark swims through the open ocean, its long tail trailing behind.
Definition
Noun: 1. A large, pelagic (open-ocean) shark species characterized by an extremely long, whiplike upper lobe of its tail fin, which it uses as a weapon to herd, stun, and kill small schooling fish upon which it feeds.
Usage
The term "thresher shark" is used to refer to any of the three species within the genus Alopias. It functions as a common name for these distinct but related sharks. - It is primarily a countable noun (e.g., a thresher shark, several thresher sharks). - It can be used attributively as a noun modifier (e.g., thresher shark population, thresher shark behavior).
Examples
- Noun:
- Marine biologists were thrilled to observe a thresher shark using its tail to slap the water.
- The most distinctive feature of the thresher shark is its elongated caudal fin.
- We saw a pod of thresher sharks hunting near the surface.
Advanced Usage
- The name originates from the verb "to thresh," meaning to beat or strike repeatedly, which describes the shark's hunting method of thrashing its tail.
- In scientific and technical contexts, the family (Alopiidae) or genus () names are used for formal classification.
Variants and Related Words
- Common thresher (): The most widespread species.
- Pelagic thresher (): A smaller species often found in deeper waters.
- Bigeye thresher (): Identified by its enormous eyes adapted for deep, dim water.
- Fox shark: A less common synonym for the thresher shark.
Synonyms
- Fox shark
- Swiveltail (regional/archaic)
Related Phrases
- Caudal fin: The technical term for the tail fin, which is highly modified in thresher sharks.
- Tail-slap feeding: The specific hunting behavior associated with this shark.
A thresher shark swims through the open ocean, its long tail trailing behind.
Noun
- large pelagic shark of warm seas with a whiplike tail used to round up small fish on which to feed