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A 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.
The anal fin has 3 spines and 14–19 soft rays. The pectoral fins have 16–18 rays, and there are 4 pectoral filaments. The upper sides of the head and body have a slight darkish silver tinge, lighting in the lower flanks. Both dorsal fins show a blackish anterior margin, with the remaining parts of the fins translucent and slightly dusky.
Fish nests (sometimes called "miracle holes"; natively known by various names like amatong, balirong, gango, tambon, etc.) is a traditional fish trap originating from the Philippines. It is a fish aggregating device , essentially an artificial reef , consisting of a conical pile of mangrove wood, waterlogged bamboo, rocks, and/or other ...
A dorsal fin is a fin on the back of most marine and freshwater vertebrates. Dorsal fins have evolved independently several times through convergent evolution adapting to marine environments, so the fins are not all homologous. They are found in most fish, in mammals such as whales, and in extinct ancient marine reptiles such as ichthyosaurs ...
A fishing weir, fish weir, fishgarth [1] or kiddle [2] is an obstruction placed in tidal waters, or wholly or partially across a river, to direct the passage of, or trap fish. A weir may be used to trap marine fish in the intertidal zone as the tide recedes, fish such as salmon as they attempt to swim upstream to breed in a river, or eels as ...
Fishing traps – A fish trap is a trap used for fishing. Fish wheel – A fish wheel is a device for catching fish which operates much as a water-powered mill wheel. Fishing weir – A fishing weir, or fish weir, is an obstruction placed in tidal waters or wholly or partially across a river, which is designed to hinder the passage of fish.
In practice, fish anatomy and fish physiology complement each other, the former dealing with the structure of a fish, its organs or component parts and how they are put together, such as might be observed on the dissecting table or under the microscope, and the latter dealing with how those components function together in living fish. The ...
The name "manta" is Portuguese and Spanish for mantle (cloak or blanket), a type of blanket-shaped trap traditionally used to catch rays. [3] Mantas are known as "devilfish" because of their horn-shaped cephalic fins, which are imagined to give them an "evil" appearance.