10 quick facts on Octopuses:
- An octopus has three hearts
- Two hearts are used to pump blood to the lungs
- Third pumps blood throughout the body.
- Some species of octopuses can immediately change their appearance with the help of pigment cells and muscles in their skin.
- They are known to eject a cloud of black ink when attacked by a predator.
- Some octopuses turns white when scared.
- Sometimes, they may also shed an arm to escape a predator. The lost arm regrows in some time.
- Octopi have short lifespans.
- Generally vary between six months and five years.
- Octopi are highly intelligent.
- Believed to be the smartest of all invertebrates.
- Show great skill at problem solving (instead of relying on instincts).
- Octopus blood is light blue.
- They have highly developed sense of sight and touch but are completely deaf.
- An adult Octopus can squeeze through a hole the size of a dime.
- They are boneless creatures.
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