Dorsal fin - Wikipedia
WEBA dorsal fin is classified as a medial, unpaired fin that is located on the midline of the backs of some aquatic vertebrates. In development of the embryo in teleost fish, the dorsal fin arises from sections of the skin that form a caudal fin fold.
Fish fin - Wikipedia
WEBA fish can have up to three dorsal fins. The dorsal fins serve to protect the fish against rolling, and assist it in sudden turns and stops. In anglerfish, the anterior of the dorsal fin is modified into an illicium and esca, a biological equivalent to a fishing rod and lure; The bones that support the dorsal fin are called pterygiophores.
Understanding Shark Fins & Types (Dorsal Fin, Pectoral, Ventral, …
WEBThe first dorsal fin is located on the top of a shark’s back and is used to stabilize the shark in the water. Lined with strong, flexible dorsal fibers, the first dorsal fin keeps a shark from rolling on it’s back and helps it make sharp turns while swimming fast. Second Dorsal Fin. The second dorsal fin is much smaller than the first ...
Dorsal fin – Fishionary - Fisheries
WEBMar 28, 2014 · The dorsal fin is a stabilizer fin. The dorsal fin is located on the top of a fish (as well as some marine mammals). Predominately, the fin is used to stabilize fish in the water and help direct the fish through turns and stops. Some fish, like Striped Bass ( Morone saxatilis ), have two dorsal fins and others have very highly derived dorsal ...
Dorsal Fin - A-Z Animals
WEBJun 30, 2023 · A dorsal fin is a type of fin present on the backs of most types of aquatic (both freshwater and marine) vertebrate animals, most notably fish and aquatic mammals like whales and dolphins. A fin is a thin, often somewhat flexible appendage attached to a larger part of an animal’s body.
Dorsal fin | animal appendage | Britannica
WEBThe dorsal fin of older males is very tall (up to 1.8 metres [5.9 feet]) and straight; females and young males have a dorsal fin that is about half that size and distinctly sickle-shaped (falcate). The skull is a metre or more in length and holds… Read More
Dorsal Fins, From Killer Whales to Narwhals - Baleines en direct
WEBSep 1, 2022 · In the narwhal, the dorsal fin is completely absent, a characteristic that betrays the species’ arctic habitat. Arctic water bodies are often covered with pack ice or ice floes under which it is easier to navigate without a dorsal fin. Killer whales have a large dorsal fin. © Yves Poirier.
Understanding Functions Of Fish Fins - FinnedFacts
WEBDorsal fins are located on the back of the fish and vary in size and shape depending on the species. They are supported by a series of fin rays that extend vertically from the fish’s body. The structure of the dorsal fin allows the fish …
Dorsal Fin - an overview | ScienceDirect Topics
WEBThe dorsal fins increase the lateral surface of the body during swimming, and thereby provide stability but at the expense of increasing drag. Their position in relation to the body during movement is stabilized by an exclusive set of fin motor neurons that are activated in antiphase with the motor neurons controlling the trunk muscles during ...
Locomotor function of the dorsal fin in teleost fishes: …
WEBSep 1, 2001 · Our overall goal is to begin an experimental hydrodynamic analysis of dorsal fin function through study of the soft dorsal fin in sunfish. The aim of future work will be to examine the locomotor roles of the spiny dorsal fin in derived teleosts as well as the soft dorsal fin in more basal clades.
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