the.com/thresher

the shark that turned its own tail into a bullwhip and goes fishing with it.

means A thresher is either a machine (or person) that separates grain from its stalks and husks by beating, or a long-tailed shark that uses its whip-like upper tail fin to stun the fish it hunts.

from From Old English þerscan, "to thresh," meaning to beat or trample grain to loosen the seed — the same root that gives us "thrash," its twin born of the same swinging motion. The shark earns the name by sheer resemblance: that elongated tail cracks through schools of fish like a flail beating wheat on a barn floor.

tail length
the tail is half the entire body
hunting method
whips tail to stun fish before eating
warm-blooded
keeps muscles hotter than surrounding water
breach speed
leaps fully clear of the ocean
original meaning
named for farm tools that beat grain
for instance

thresher shark — species with a tail fin as long as its body, found in tropical and temperate oceans worldwide

case ih axial-flow combine — modern threshing machine used to harvest grain crops since the 1980s

uss thresher — nuclear submarine that imploded in 1968 in the atlantic ocean, first submarine lost at sea

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