FIGURE 1. Why does an octopus have 9 brains? Having eight arms, this means that an octopus has eight ganglia. When cephalopods are compared with mammals, the lack of any common anatomy only increases the difficulties. By Staff Writer Last Updated Mar 27, 2020 9:41:09 AM ET. eval(ez_write_tag([[300,250],'wildlifeinformer_com-box-4','ezslot_8',109,'0','0']));At the base of each arm, there is a cluster of nerve cells or neurons that control the movement of each arm. In the wild, octopuses have been observed to collect rocks and shells to stack outside of their dens to prevent unwanted visitors or predators. This is used to describe the way that their tentacles or feet are connected to their head. eval(ez_write_tag([[300,250],'wildlifeinformer_com-large-mobile-banner-1','ezslot_9',114,'0','0']));Yes, octopuses are incredibly smart. These clusters are known as “ganglia”. An octopus has one brain. The way that the neurons are distributed throughout the arm from the ganglia not only allows each arm to process sensory input individually but also amplifies what they sense. Monterey bay aquarium provides an excellent series of octopus videos that I can highly recommend. Not only that, but make it into neighboring enclosures where they devour the neighboring fish in other tanks. (C) A cross section of the vertical lobe (supra-esophageal mass), showing the five distinct gyri. An additional benefit to the ganglia is that the main brain of the octopus can focus on problem solving, perhaps even planning. However, unlike other creatures, not all of its neurons are located in its brain. Octopuses don’t just have eight tentacles, but they also have three … (B) A longitudinal section of the supra- and sub-esophageal mass of O. vulgaris (parasagittal plane). 8 Tentacles, 3 Hearts, 9 Brains. Anoop Kumar/CC-BY-2.0. Brain size does not always indicate how intelligent an animal is, but as a general rule, animals with larger brain to body ratios tend to have more “brain power” to invest. Also, when precise coordination in arm movements is required, the ganglia can communicate and coordinate with each other without having to go through the main brain. An octopus has three hearts, nine brains, and blue blood. The class cephalopoda includes animals like the nautilus, squids, cuttlefish and octopuses. Here you’ll find facts, common questions, and general info about all kinds of wildlife and exotic pets. Brain size and structure. All of this brain power is invested in helping octopuses hunt, solve problems, and protect themselves. Of those, 30 to 40 percent reside in its formal brain located in its head. Comparing octopus brains to all chordate brains: Different animals are good at different things, as makes sense given the different lives they live. In fact, cephalopods like octopuses are incredibly intelligent and continue to wow scientists with their intellect. The brain of an octopus can be compared to the brain of a dog. Samantha is an outdoor enthusiast and studying to get her masters degree in Environmental Biology. The way that animals think is very different then how humans think. Octopuses essentially have a brain at the base of each arm which are connected to a larger, central brain. eval(ez_write_tag([[300,250],'wildlifeinformer_com-large-mobile-banner-2','ezslot_13',117,'0','0']));It can be difficult to measure intelligence in animals, because animals obviously perceive their surroundings and environment in an entirely different way than we do as humans. This allows them to take advantage of their highly developed and advanced eye structure. Imagine freeing up your brain for more profound thought and analysis. (A) Schematic outline of octopus body and the relative relationships to the main components of its nervous system. The incirrate octopuses (the majority of species) lack the cirri and paired swimmi… Crabs have a split nervous system that consists of a dorsal ganglion, which is the crab's brain, and a ventral ganglion. Octopus brains are also larger than other vertebrate species, although they are not larger than mammal’s brains. Neurons are fundamental units of the brain and help to send signals and information from the brain to other parts of the body, and octopuses have a lot of them! It also allows for a large number of neurons in the main brain to be dedicated to processing input from the optic nerve of the octopus. Vertebrate brains all have a common architecture. Not only that, but each arm has around 250 suckers that they use to taste and smell. (Don’t Forget These Things), What Do Leopard Geckos Need in Their Tank? An octopus has approximately 500 million neurons. 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