Interesting facts about Octopus

1. Retina contains 20 million photoreceptors.
2. The eye has a flicker fusion frequency of 70/sec in bright light.
3. The pupil of the eye is rectangular.
4. Octopus has chemoreceptors (taste receptors) on the suckers of their tentacles. By tasting this way, an octopus does not have to leave the safety of its home.