bathyal zone

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Noun1.bathyal zone - the steep descent of the seabed from the continental shelf to the abyssal zone
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References in periodicals archive ?
It is the fourth zone to have distinct biological species within 3,000 meters of depth after Altiphotic, Mesophotic, and Bathyal Zone.
According to Nekton, much like the space race of the 1950s and 1960s, we now face a 'race to the deep', before the damage created by human activity, such as pollution and overfishing, encroaches catastrophically on the bathyal zone (the deep ocean between 200 and 3,000 feet), where the majority of marine life exists.
The biofacies analysis suggests that Panoba Formation was deposited in a variety of settings ranging from middle neritic zone to upper bathyal zone environments.
Ohta, "Spatial structure within a dense bed of the brittle star Ophiura sarsi (Ophiuroidea: Echinodermata) in the bathyal zone off otsuchi, Northeastern Japan," Journal of the Oceanographical Society of Japan, vol.