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In many fish, the pectoral fins aid in walking, especially in the lobe-like fins of some anglerfish and in the mudskipper (see also walking fish) Certain rays of the pectoral fins may be adapted into finger-like projections, such as in sea robins and flying gurnards; In skates and rays, the pectoral fins are used for propulsion (rajiform ...
Pelvic fins or ventral fins are paired fins located on the ventral (belly) surface of fish, and are the lower of the only two sets of paired fins (the other being the laterally positioned pectoral fins). The pelvic fins are homologous to the hindlimbs of tetrapods, [1] which evolved from lobe-finned fish during the Middle Devonian.
The cleithral spine is short and is located over the pectoral fin and extends just to the first quarter of the pectoral fin. [8] The lower three rays of the pectoral fins have developed into separate, finger-like processes that are packed with sensory organs with which the gurnard seems to "walk" while detecting prey in the sediment.
The flattened head and body of various fishes such as stingrays, which also commonly includes the pectoral and ventral fins. distal Remote from the point of attachment. dorsal Pertaining to the back. dorsum The upper (dorsal) surface of the head or body. dorsal fin The fin on a fish's back. dorsal fin origin The most anterior point of the ...
The pectoral fin has 15 or 16 rays, and this fin has a length which is equal to 20 to 23% of the standard length, and its tip does not reach the tip of pelvic fin; almost all the rays of the pectoral fin are unbranched except that in the largest specimens some of the rays may be branched. There are six pectoral filaments, the first is the ...
In total, the lined seahorse has eleven trunk rings, 34–39 tail rings, 16–20 dorsal fin rays, and 14–18 pectoral fin rays. The pectoral fin is level with the eye on each back side of the lined seahorse's head. The dorsal fin is located on the back of the skeleton and is level with the stomach–chest area. Female dorsal fins are slightly ...
The first dorsal fin has 9 spines while the second dorsal fin has 15 or 16 soft rays and the anal fin has between 14 and 16 soft rays. There are 14 pectoral fin rays, 11 enclosed within the fin membrane, with and the 3 lower pectoral fin rays detached from the membrane. [5] The upper body is reddish and the lower body is white.
The small, slender pelvic fins are located underneath the throat and possess a single spine; the large anal fin may have one or two spines. The pectoral fins are greatly enlarged, and the tail fin is rounded. The New Zealand topknot, Notoclinus fenestratus, is the largest species at 20 cm in total length; most other species do not exceed 6 cm.