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sea chub,common name for members of the family Kyphosidae, small-mouthed fishes of warm seas throughout the world. Rudderfishes commonly follow vessels (whence their name), scavenging on refuse. Best known is the Bermuda chub, averaging 3 to 4 lb (1.3–1.8 kg), common off the Florida coasts. Rudderfishes are classified in the phylum ChordataChordata
, phylum of animals having a notochord, or dorsal stiffening rod, as the chief internal skeletal support at some stage of their development. Most chordates are vertebrates (animals with backbones), but the phylum also includes some small marine invertebrate animals.
..... Click the link for more information. , subphylum Vertebrata, class Actinopterygii, order Perciformes, family Kyphosidae.