Starfish are interesting sea creatures because they look like stars. They are a relatively representative echinoderm, and researchers have done a lot of research experiments on them. In the process of observing them, many people will think that they have no eyes. In fact, they can be regarded as having eyes, but not real eyes. If you look closely, you will find that the starfish has a red eye spot at the end of each of its five arms, a total of five.
The eyes of starfish are very different from those of humans, and from those of most animals. The eyes of humans and most animals can see things around them relatively clearly. The eyes of starfish are compound eyes, and they are made up of many single eyes. Their eyes are only sensitive to light, which is a photosensitive area, which can help them hunt for prey or avoid enemies. However, they are generally unable to see the specific things around them. Generally speaking, starfish have negative phototaxis, they do not like light very much, and like to live in darker places.
Starfish is an animal, we are more familiar with the appearance of starfish, careful observation will find that many organs they are not, with most animals are different. In fact, starfish as an echinoderm, as an invertebrate, they are relatively low organisms, so some structures do not exist in them. For example, the eyes of the starfish described above can be photosensitive, but they are not real eyes. Plus, they don't have noses.
