Pelagic life decreases with increasing depth.
The word"Pelagic" is derived from Ancient Greek πέλαγος(pélagos),
meaning'open sea.
Both larvae and caviar are Pelagic, and fertility is up to 800 thousand eggs.
Dolphins in warmer, shallower waters are generally smaller,
while those in cooler, Pelagic regions are typically larger.
However, some inhabit freshwater environments and, with the exception of the Pelagic zone, marine environments as well.
These Phumdis support large congregation of migratory, Pelagic and resident fishes which use these floating islands
as potential breeding grounds.
Large-scale physical oceanographic processes, such as ocean currents, upwelling, and eddies can cause considerable mixing and
affect long-distance transport of Pelagic larvae.
North of 50° south latitude,
86% of the main basin is covered by Pelagic sediments, of which more than half is globigerina ooze;
the remaining 14% is layered with terrigenous sediments.