pectoral fin

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Related to Pectoral fins: ventral fin, pelvic fins

pectoral fin

either of a pair of fins, situated just behind the head in fishes, that help to control the direction of movement during locomotion

pectoral fin

[′pek·tə·rəl ′fin]
(vertebrate zoology)
One of the pair of fins of fishes corresponding to forelimbs of a quadruped.
References in periodicals archive ?
Dorsal-fin origin normally closer to tip of snout than to caudal-fin origin; pectoral-fin i,11-13, usually 12 rays; pectoral-fin not reaching pelvic-fin origin; pectoral fin length: 16.
Video analysis of an Aleutian Island specimen (100 mm total length; weight 15 g) presented with six scallop shells (Chlamys hastata, length 42-50 mm) resting on sand revealed the fish systematically lifting and inspecting each shell, and alternating its lifts between its right and left pectoral fins.
Dorsal fin X or XI, 16 or 17; anal fin III, 16; pectoral fin 19 or 20; Caudal fin: procurrent rays 4 + 4-5, segmented rays 8 + 8, middle 12 branched, total elements 24 of 25; fifth hypural present or absent Vertebrae: 10 + 19; last pleural rib on vertebra 10; epineural ribs 12; one supraneural bone.
8, fin tips when depressed reaching to base third or fourth soft anal fin ray in mature males and to first or second soft anal ray in females; length of pectoral fins 1.
rohita were significantly different; the fork length, dorsal, caudal and pelvic fin lengths were highly significantly different; while in case of total length and pectoral fin length there was non significant difference among the sites (Table I).
3A), but depressed fin pale yellow with oblique rows of dark pigment; adipose fin pale with at least one dark marking dorsally; pectoral fin pale with approximately 6 wavy, irregular bars of dark brown pigment; pelvic fins bright yellow; anal fin yellow; center of caudal fin (at anterior end of fork) and posterior portion of ventral caudal lobe dark gray to brown; dorsal caudal lobe pale with light, dusky pigment on posterior margin; dorsal caudal lobe with 2-3 small brown bars on procurrent rays.
rogersi is specially based on the undulation of pectoral fins (rather than the tail) (Wilga & Lauder, 2004), it is possible that these individuals had difficulties in swimming and escaping from potential predators (sharks), and secondly, its capabilities as a predator would be significantly limited, even with their well-formed mouths that will allow them to feed on their prey such as polychaetes, shrimps and crabs (Navia et al.
8) in SL; pectoral fins pointed, eleventh or twelfth ray longest, reaching to slightly beyond level of pelvic fin tips, 5.
Small star-shaped melanophores are also present on the pectoral fins: three or more on the distal margin of the surrounding membrane of the pectoral fins, two or more on the distal region of the pectoral fin bud, and one on the pectoral fin base.
Combining this information with that in the literature (Jordan and Evermann 1898; Norman 1934; Hensley 1995a; Moser and Charter 1996), speckletail flounder has the following ranges of meristics: dorsal fin (78-89); anal fin (66-72); pectoral fins (10-13); pelvic fins (6); caudal fin (17 total); gill rakers (3-4 upper, 6 lower); lateral line pores (64-68 eyed side, no lateral line on blind side); lateral line scales (59-68).