The pelagic zone consists of the water column of the open ocean and can be further divided into regions by depth. The word pelagic is derived from Ancient...

predominantly a pelagic species but forms large aggregations near the seabed when it spawns on banks of gravel. Two types of fish inhabit the demersal zone: those...

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 (ábussos), meaning...

Pelagic fish live in the pelagic zone of ocean or lake waters—being neither close to the bottom nor near the shore—in contrast with demersal fish that...

submarine ridges and deep ocean trenches known as the hadal zone. For comparison, the pelagic zone is the descriptive term for the ecological region above...

that are commonly assumed to reside in the pelagic zone often rely heavily on resources from the littoral zone. Littoral areas of ponds and lakes are typically...

The mesopelagic zone (Greek μέσον, middle), also known as the middle pelagic or twilight zone, is the part of the pelagic zone that lies between the photic...

of the number of animals) on our planet. Abyssal zone Benthic zone Hadal zone Pelagic zone Photic zone Earle, Sylvia A.; Thorne-Miller, Boyce (1999). The...

The sunlight zone is 200 meters deep.The photic zone, euphotic zone, epipelagic zone, or sunlight zone is the uppermost layer of a body of water that...

species of sea slug in the genus Glaucus. These sea slugs live in the pelagic zone (open ocean), where they float upside-down by using the surface tension...