Jellyfish and octopus are two completely different creatures, but some people may confuse them. In fact, they are different in many ways:
1. Family and genus categories: The family and genus categories of jellyfish and octopus are different. They are two different kinds of organisms. Octopuses belong to the octopus family, octopus, but jellyfish belong to the jellyfish family. Moreover, octopus belongs to mollusks, but jellyfish belongs to coelenterates, which is lower than octopus.
2. Appearance: Jellyfish and octopus are completely different in appearance. Octopus is also called "octopus", and its eight tentacles are their most obvious characteristics. Although jellyfish also have tentacles, these tentacles are obviously different from octopuses, because they are only whisker-shaped bands, and some are very long, some can even reach 20-30 meters.
3. Body structure: The body structure of octopus and jellyfish is also very different. For example, octopuses have three hearts, but jellyfish have no heart. For example, octopuses have nine brains, while jellyfish have no brains.
4. Distribution range: The distribution range of octopus and jellyfish is also different. We can cite an example of their distribution in China. Generally speaking, octopus is more widely distributed, and it is also distributed in more northerly places. But jellyfish are mainly distributed in some provinces in the south of China, such as Hainan Province, Guangdong Province and so on.
As mentioned above, octopus has nine brains, one of which is the main brain and the other eight are the parencephalon. In fact, the octopus brain is still relatively developed, their nervous system is also relatively developed, which makes the octopus IQ will be relatively high. But jellyfish have no brain, they only have a nervous system, so jellyfish are obviously less intelligent than octopus.
