Cuttlefish and octopus are both mollusks, so they are similar in some ways, but they are not the same kind of organisms, so they should not be confused. They are different in the following aspects:
1. Family and genus differences: Cuttlefish and octopus are not the same organism, so their family and genus are different. Cuttlefish is also known as "cuttlefish", "squid", is a cuttlefish family, cuttlefish genus. Octopus is the "octopus" common name, so is the octopus, octopus genus.
2. Appearance difference: The appearance of cuttlefish and octopus is also different. Overall, except for the tentacles, the octopus's body is round, if it can be cut from a cross-section, then it is round. Cuttlefish are flatter.
3. Differences in body structure: The body structure of the two is also different. For example, the number of tentacles, cuttlefish has 10 tentacles, they are symmetrical to each other, but octopus is like its name, only 8 tentacles. Another example is the brain, the octopus has a brain system, but the cuttlefish has no brain.
4. Habit difference: The habits of the two will also be different. Cuttlefish prefer light, which makes it easier for humans to catch them and attract them with the help of light. But octopus are mainly distributed in the darker parts of the sea floor.
As mentioned above, cuttlefish and octopus in the body structure is different, which cuttlefish is no brain, but octopus is a brain. Therefore, the octopus is more intelligent than the two, and some of their behavior can be said to be the result of thinking. Although the cuttlefish also has a nervous system, their behavior is basically based on instinct and feeling, can not be said to have been thought.
