DYK: Octopuses, their 9 Brains and 3 Hearts.

Did you know….

Octopuses, the armed sea creatures have are very intelligent, boneless, have 3 hearts and blue blood? Their arms, often called appendages tentacles seem to have a mind of their own with each able to work independently because of the vast neurons located in them. Also, they have an excellent sense of touch and taste through their suckers located on their arms.

Detailed diagram showing the intricate of an Octopus

Their boneless bodies , often made up of soft matter, enable them squeeze through and access most remote or tiniest of spaces for food, escape or out of curiosity. Their heads are protected by bulbous sack like body, and have powerful jaws and parrot-like beak for feeding. They are carnivorous and feed on fish, birds, sharks, lobsters and clams.

The biggest octopuses, which are cannibalistic are found in the Pacific grows from 5m to a staggering 10m long and weigh from 50kg up-to almost 300kgs. The Pacific giants live up-to 5 0 years, a record considering their short life spans of around 6 months. During mating, a specialized arm from a male octopus delivers sperm into a female’s mantle cavity. She lays up-to 400,000 fertilized eggs, and upon hatching, she dies soon a phenomena called the cellular suicide. The male too dies in a month or so after mating.

The giant Pacific Octopus, scientifically identified as Enteroctopus dofleini

Octopuses have a brain and are as smart as house cats. Their brains have evolved over time and enabled them develop intelligence to solve ecological challenges and survive in their marine environment. It’s established that they have nine brains, which enable them in maneuverability and coordination of its complex body system. Their 3 hearts play a critical role, with one heart pumping blood to its various body organs, the other two pumping blood to circulate to and through its gills. While swimming, the third heart stops beating, making the octopuses seem to crawl rather than swim, as their organs mobility is minimized. The blue blood could be explained to be a result of copper rich hemacyanin. Taking into consideration the low temperatures and low oxygen concentrations the octopuses live in, hemacyanin is more efficient than hemoglobin.

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