The Octopuses

Today we decided to write about very fascinating sea creature - the octopuses. They inhabits many diverse regions of the ocean, including coral reefs, pelagic waters, and the ocean floor. They have numerous strategies for defending themselves against predators, including the expulsion of ink, the use of camouflage and demotic displays, their ability to jet quickly through the water, and their ability to hide. All octopuses are venomous, but only one group, the blue-ringed octopuses, is known to be deadly to humans. There are around 300 recognized octopus species, which is over one-third of the total number of known cephalopod species.

Octopuses are highly intelligent, likely more so than any other order of invertebrates. They have a highly complex nervous
system, only part of which is localized in its brain.

When octopuses reproduce, males use a specialized arm called a hectocotylus to insert spermatophores into the female. Males die within a few months of mating. The female hangs the eggs in strings from the ceiling of her lair. She cares for the eggs, guarding them against predators, and gently blowing currents of water over them so that they get enough oxygen. The female does not hunt during the roughly one-month period spent taking care of the unhitched eggs and may ingest some of her own arms for sustenance. At around the time the eggs hatch, the mother leaves the lair and is too weak to defend herself from predators