image source WIKIPEDIA
Octopuses live in every ocean, and different species have adapted to different marine habitats. As juveniles, common octopuses inhabit shallow tide pools. The Hawaiian day octopus (Octopus cyanea) lives on coral reefs; argonauts drift in pelagic waters. Abdopus aculeatus mostly lives in near-shore seagrass beds. Some species are adapted to the cold, ocean depths. The spoon-armed octopus (Bathypolypus arcticus) is found at depths of 1,000 m (3,300 ft), and Vulcanoctopus hydrothermalis lives near hydrothermal vents at 2,000 m (6,600 ft).The cirrate species are often free-swimming and live in deep-water habitats. Although several species are known to live at bathyal and abyssal depths, there is only a single indisputable record of an octopus in the hadal zone; a species of Grimpoteuthis (dumbo octopus) photographed at 6,957 m (22,825 ft). No species are known to live in fresh water.
Octopus vulgaris are found worldwide in tropical and temperate waters.
They are abundant in the Mediterranean Sea, off the coast of Japan, and in the
Eastern Atlantic in coastal waters between 1-200 m.
Found in nearshore shallow waters
to the outer edge of the continental shelf (in depths from 0-200 m). Most scientist
believe that O. vulgaris actually contains a number of related sister species. While
this species, or species-complex, is very widely distributed around the world, its
taxonomic and geographic parameters still are not precisely defined. The following
are “types” of Octopus “vulgaris” based on geographical distribution: