dorsal fin

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Related to dorsal fin: caudal fin

dorsal fin

One of one or more unpaired fins on the back of fishes and certain marine mammals.

dorsal fin

any unpaired median fin on the backs of fishes and some other aquatic vertebrates. The fin maintains balance during locomotion.

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Colour of holotype in alcohol pale brownish yellow, with a faint, dusky-edged, pale stripe, narrower than pupil, beginning above opercle and extending parallel to dorsal profile of postorbital head and nape to below rear half of first dorsal fin; dorsal fins with pale yellowish rays and faintly dusky membranes; remaining fins pale yellowish.

Three new species of the gobiid fish genus Tryssogobius from the western and South Pacific

This group is easily identifiable due to the long dorsal fin, which begin before the pelvic fin in males and the presence of two small black spots in the caudal peduncle of females.

Hypsolebias trifasciatus, a new species of annual fish cyprinodontiformes: rivulidae from the rio preto, rio sao francisco basin, northeastern brazil

It lives in shallow waters from Morocco to the English Channel and spends most of its time buried under the sea bed with only its eyes and venomous dorsal fin poking out from the sand.

Danger that's lurking in our coastal waters; VENOMOUS FISH CAUSES AGONISING PARALYSIS

Caudal-fin base dark yellow, lobes hyaline; pectoral fin yellow with rays dark basally, pelvic fins hyaline, dorsal fin with dark bands extending on to rays, more pronounced on the tips.

Five new species of Hemibrycon (Characiformes: Characidae) from the Rio Magdalena basin, Colombia

The dorsal fin fold begins behind the brain area (Fig.

Larval development of the spotfin tonguefish (Symphurus oligomerus Mahadeva and Munroe, 1990) (Pleuronectiformes: Cynoglossidae) from the Gulf of California, Mexico

Body depth is the greatest depth to the base of the dorsal fin (adjusting for any malformation of the abdomen due to preservation).

Cirrhilabrus cenderawasih, a new wrasse (Pisces: Labridae) from Papua, Indonesia

6 % of SL, calculated from photographs), taller first dorsal fin, and longer soft dorsal and anal rays.

Three new species of Rainbowfishes (Melanotaeniidae) from the Birds Head Peninsula, West Papua Province, Indonesia

Based on examination of these genetically identified individuals, significant differences were found in body color, specifically spotting on the spinous dorsal fin or an overall darker color (or both) in S.

Species of the rougheye rockfish complex: resurrection of Sebastes melanostictus (Matsubara, 1934) and a redescription of Sebastes aleutianus (Jordan and Evermann, 1898) (teleostei: scorpaeniformes)

The diacritically meristic counts were listed as follows: first dorsal fin with a single small isolated spine anteriorly; gill rakers 2-3+4-6=6-9; pored lateral line scales 73-80 and caudal fin with a yellow marking on the middle when fresh.

Morphological Re-Description and DNA Barcoding of Platycephalus indicus Collected from Beihai, China

This particular species of dolphin has a highly variable dorsal fin shape which can sometimes be so tall and straight that they are mistaken for their larger relatives, the killer whale.

Rarely-seen dolphins are spotted

smooth dogfish and Florida/Gulf smoothhound) Predorsal ridge present; second dorsal fin slightly smaller than first dorsal fin and much larger than anal fin; max.

Sorting out the sharks

Anterior dorsal fin has spines which are not separated from posterior one that has one spine and 13 fins rays [3].

Variation in the Morphometry Measurements of Two Tilapia Fish Species in Relation to Their Body Weight Obtained from Lower Benue River at Makurdi, Benue State Nigeria