The Collaborative International Dictionary
Sebastodes flavidus
Yellowtail \Yel"low*tail`\, n. (Zo["o]l.)
Any one of several species of marine carangoid fishes of the genus Seriola; especially, the large California species ( Seriola dorsalis) which sometimes weighs thirty or forty pounds, and is highly esteemed as a food fish; -- called also cavasina, and white salmon.
The mademoiselle, or silver perch.
The menhaden.
The runner, 12.
A California rockfish ( Sebastodes flavidus).
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The sailor's choice ( Diplodus rhomboides).
Note: Several other fishes are also locally called yellowtail.