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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 ...
A peculiar function of pectoral fins, highly developed in some fish, is the creation of the dynamic lifting force that assists some fish such as sharks in maintaining depth and also enables the "flight" for flying fish. Certain rays of the pectoral fins may be adapted into finger-like projections, such as in sea robins and flying gurnards.
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.
There is a scattering of dark spots on the anal, dorsal and caudal fins. The head is marked with 3 dark brown bars, one of which is a diagonal bar running through the eye which ends in a large spot on the lower operculum. The long tentacles over each eye are banded and in larger adults there are bluish-black blotches close the pectoral fin ...
In modern fishes, the cleithrum is a large bone that extends upwards from the base of the pectoral fin and anchors to the cranium above the gills, forming the posterior edge of the gill chamber. [2] The bone has scientific use as a means to determine the age of fishes. The lobe-finned fishes share this arrangement.
They used paired pectoral and pelvic fins for locomotion. The pectoral fins developed into forelegs (arms in the case of humans) and the pelvic fins developed into hind legs. [50] Much of the genetic machinery that builds a walking limb in a tetrapod is already present in the swimming fin of a fish. [51] [52] Comparison between A) the swimming ...
The pectoral fin is situated far below the midline of body. There are 5 pectoral filaments, the first being the shortest and this filament just reaches to or extends beyond the start of the anal fin. The remaining pectoral filaments reach well past the ends of lobes of the caudal fins with the third filament being the longest being 2.5-3 times ...
The pectoral fins and tail fin are greyish while the other fins are colourless. Juvenile fish are sometimes barred with black. [3] This species can be distinguished from the oceanic two-wing flyingfish (Exocoetus obtusirostris) by having a less blunt snout and by the origin of the anal fin being at a location behind the origin of the dorsal fin ...