pectoral fin

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Related to pectoral fin: pelvic fin
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  • noun

Words related to pectoral fin

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

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References in periodicals archive ?
Caption: The spotted handfish takes its name from the long, flared shape of its pectoral fins.
The dorsal, anal, and pectoral fins are larger and longer in Mississippi Silversides, the depressed pectoral fin extends back 90% or more of the distance to the vent whereas it extends 50% or less of this distance in the three native atherinopsids.
6% SL), tip of pectoral fin reaching the 3rd to 4th anal-fin ray (vs.
2h) some such platelets just beneath the pectoral fin base, distributed stepwise in rows.
Pectoral fin short and rounded, posterior margin reaching vertical at about 60 % of length between pectoral- and pelvic-fin bases.
The fish went back after he and Ashley both noted distinctive markings on the back and pectoral fin.
Using a thin, eight-inch knife he has just sharpened, he slices into it just below the pectoral fin on the side near the head.
By 84 hours, the retina was pigmented, and somites and the pectoral fin were developed.
The permits required suspension of testing if whales behaved in unusual ways, such as repeated breaching or pectoral fin or tail slapping.
Resting of a pectoral fin against the side of another dolphin can be a signal of friendship, or possibly that the first dolphin wants a favor from the second.
Discusss the terms: pectoral fin, dorsal fin, coloration, diet, gender, reproduction, habitat, and legal catch length.
1998): body length (BL), distance from the tip of the snout to the notochord tip (in preflexion and flexion larvae), and to the posterior margin of the hypural bones (postflexion larvae and posttransition juvenile); eye diameter (ED), longest diameter of the eye; snout length (SnL), distance from the tip of the snout to the anterior margin of the eye; head length, distance from the tip of the snout to the posterior margin of the opercle; body depth, vertical distance on pectoral fin base; preanal length, distance from the tip of the snout to the anus.
Recently, a humpback whale was spotted flapping its distinctive pectoral fin as boatmen nearby filmed the amazing animal.
Their malevolent reputation is understandable if you've been stuck by a dorsal or pectoral fin spine.