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  2. Pelagic fish - Wikipedia

    en.wikipedia.org/wiki/Pelagic_fish

    Many large pelagic fish are oceanic nomadic species that undertake long offshore migrations. They feed on small pelagic forage fish, as well as medium-sized pelagic fish. At times, they follow their schooling prey, and many species form schools themselves. Examples of larger pelagic fish are tuna, billfish, king mackerel, sharks, and large rays.

  3. Pelagic zone - Wikipedia

    en.wikipedia.org/wiki/Pelagic_zone

    Altogether, the pelagic zone occupies 1,330 million km 3 (320 million mi 3) with a mean depth of 3.68 km (2.29 mi) and maximum depth of 11 km (6.8 mi). [2] [3] [4] Pelagic life decreases as depth increases. The pelagic zone contrasts with the benthic and demersal zones at the bottom of the sea. The benthic zone is the ecological region at the ...

  4. Ocean surface ecosystem - Wikipedia

    en.wikipedia.org/wiki/Ocean_surface_ecosystem

    Diverse pelagic and reef fish species live at the surface when young, [12] including commercially important fish species like the Atlantic cod, salmon, and billfish. Neuston can be concentrated as living islands that completely obscure the sea surface, or scattered into sparse meadows over thousands of miles.

  5. Marine habitat - Wikipedia

    en.wikipedia.org/wiki/Marine_habitat

    Most deep sea pelagic fishes belong to their own orders, suggesting a long evolution in deep sea environments. In contrast, deep water benthic species, are in orders that include many related shallow water fishes. [71] The umbrella mouth gulper is a deep sea eel with an enormous loosely hinged mouth. It can open its mouth wide enough to swallow ...

  6. Demersal zone - Wikipedia

    en.wikipedia.org/wiki/Demersal_zone

    The distinction between demersal species of fish and pelagic species is not always clear cut. The Atlantic cod (Gadus morhua) is a typical demersal fish, but can also be found in the open water column, and the Atlantic herring (Clupea harengus) is predominantly a pelagic species but forms large aggregations near the seabed when it spawns on banks of gravel.

  7. Marine larval ecology - Wikipedia

    en.wikipedia.org/wiki/Marine_larval_ecology

    Pelagic larvae can disperse large distances, colonize new territory, and move away from habitats that has become overcrowded or otherwise unsuitable. A long pelagic larval phase can help a species to break its parasite cycles. Pelagic larvae avoid benthic predators. Dispersing as pelagic larvae can be risky.

  8. Marine coastal ecosystem - Wikipedia

    en.wikipedia.org/wiki/Marine_coastal_ecosystem

    A marine coastal ecosystem is a marine ecosystem which occurs where the land meets the ocean. Worldwide there is about 620,000 kilometres (390,000 mi) of coastline. Coastal habitats extend to the margins of the continental shelves, occupying about 7 percent of the ocean surface area.

  9. Mesopelagic zone - Wikipedia

    en.wikipedia.org/wiki/Mesopelagic_zone

    Cold water species were especially vulnerable to decline. [32] Tasselled anglerfish (Rhycherus filamentosus) Mesopelagic fish are adapted to a low-light environment. Many fish are black or red, because these colors appear dark due to the limited light penetration at depth. [16]