any spiny-rayed fishes of the family Polynemidae, having the lower part of the pectoral fin composed of numerous, separate, filamentous rays.
Origin of threadfin
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2019
noun plural -fin or -fins
any spiny-finned tropical marine fish of the family Polynemidae, having pectoral fins consisting partly of long threadlike rays
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