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  2. Bottom trawling - Wikipedia

    en.wikipedia.org/wiki/Bottom_trawling

    Bottom trawling is trawling (towing a trawl, which is a fishing net) along the seafloor. It is also referred to as "dragging". The scientific community divides bottom trawling into benthic trawling and demersal trawling. Benthic trawling is towing a net at the very bottom of the ocean and demersal trawling is towing a net just above the benthic ...

  3. Demersal fish - Wikipedia

    en.wikipedia.org/wiki/Demersal_fish

    Demersal fish, also known as groundfish, live and feed on or near the bottom of seas or lakes (the demersal zone). [1] They occupy the sea floors and lake beds, which usually consist of mud, sand, gravel or rocks. [1] In coastal waters, they are found on or near the continental shelf, and in deep waters, they are found on or near the ...

  4. Fish aggregating device - Wikipedia

    en.wikipedia.org/wiki/Fish_aggregating_device

    Fish aggregating device. A fish aggregating (or aggregation) device (FAD) is a man-made object used to attract pelagic fish such as marlin, tuna and mahi-mahi (dolphin fish). They usually consist of buoys or floats tethered to the ocean floor. Various types of FADs have been employed in the traditional fishing cultures of Island Southeast Asia ...

  5. Steven Callahan - Wikipedia

    en.wikipedia.org/wiki/Steven_Callahan

    Surviving for 76 days adrift on the Atlantic Ocean; Adrift: Seventy-six Days Lost at Sea. Steven Callahan (born February 6, 1952) is an American author, naval architect, inventor, and sailor. In 1981, he survived for 76 days adrift on the Atlantic Ocean in a liferaft. Callahan recounted his ordeal in the best-selling book Adrift: Seventy-six ...

  6. Deep-sea fish - Wikipedia

    en.wikipedia.org/wiki/Deep-sea_fish

    Deep-sea fish. Deep-sea fish are fish that live in the darkness below the sunlit surface waters, that is below the epipelagic or photic zone of the sea. The lanternfish is, by far, the most common deep-sea fish. Other deep-sea fishes include the flashlight fish, cookiecutter shark, bristlemouths, anglerfish, viperfish, and some species of eelpout.

  7. Swim bladder disease - Wikipedia

    en.wikipedia.org/wiki/Swim_bladder_disease

    The swim bladder is an internal gas-filled organ that contributes to the ability of a fish to control its buoyancy, and thus to stay at the current water depth without having to waste energy in swimming. [1] A fish with swim bladder disorder can float nose down tail up, or can float to the top or sink to the bottom of the aquarium.

  8. Remora - Wikipedia

    en.wikipedia.org/wiki/Remora

    Remora. The remora (/ ˈrɛmərə /), sometimes called suckerfish or sharksucker, is any of a family (Echeneidae) of ray-finned fish in the order Carangiformes. [4] Depending on species, they grow to 30–110 cm (12–43 in) long. Their distinctive first dorsal fins take the form of a modified oval, sucker-like organ with slat-like structures ...

  9. Mesopelagic zone - Wikipedia

    en.wikipedia.org/wiki/Mesopelagic_zone

    t. e. The mesopelagiczone (Greek μέσον, middle), also known as the middle pelagic or twilight zone, is the part of the pelagic zone that lies between the photic epipelagic and the aphotic bathypelagic zones. [ 1 ] It is defined by light, and begins at the depth where only 1% of incident light reaches and ends where there is no light; the ...

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