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rudderfish

noun

Definition of rudderfish

: any of various fishes reputed to follow or accompany ships:
a : pilot fish sense 1
b : banded rudderfish
c : any of several butterfishes (family Stromateidae)
d : any of various fishes of the family Kyphosidae especially : bermuda chub
e : the opaleye or other fish of the family Girellidae

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First Known Use of rudderfish

1735, in the meaning defined above

History and Etymology for rudderfish

rudder entry 1 + fish

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The first known use of rudderfish was in 1735

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