Abyssal zone
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The abyssal zone or abyssopelagic zone is a layer of the pelagic zone of the ocean. The word abyss comes from the Greek word ἄβυσσος, meaning "bottomless". At depths of 4,000–6,000 m, this zone remain
A dense gathering of Rimicaris hybisae shrimp at the Beebe Hydrothermal Vent Field in the Mid-Cayman Rise. The shrimp are almost entirely blind, surviving at the interface of cold, deep seawater and supercritical hydrothermal fluid.
Hadal zone
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The hadal zone, also known as the hadopelagic zone, is the deepest region of the ocean, lying within oceanic trenches. The hadal zone ranges from around 6 to 11 km below sea level, and exists in long,
Schematic representation of the zones in the ocean
The supergiant amphipod (Alicella gigantea) is found in the Hadal zone (collected from Japan Trench, 2022)
Bathyscaphe Trieste in 1958, used by Piccard and Walsh to reach Challenger Deep