The starfish is a creature that lives in the ocean, and it is also a kind of creature that we are familiar with. They are widely distributed in shallow seas all over the world. Many people will think that starfish are always static and do not move, so they will think that they are not animals. But in fact, starfish is also an animal, not a plant.
Although starfish do not appear to move, they can actually move slowly. Moreover, starfish are carnivores, using their tentacles to hunt for food and spitting out their stomach pouches when they eat. Starfish is a vital animal in the marine food chain, which is an indispensable link and plays an important role in maintaining the balance of marine ecosystems.
Coelenterates refer to many organisms under the phylum Coelenterata, which have some common characteristics, such as living mostly in the ocean and a small part in fresh water; Their bodies are radially symmetrical, so they can feel stimulation from all sides; They generally have stinging cells on the surface of their bodies, which can release venom and so on.
As mentioned above, starfish are animals. But the starfish is not a coelenterate, but an echinoderm, a creature in the phylum Echinodermata. Echinoderms are different from coelenterates, which are relatively advanced invertebrates, but coelenterates are relatively inferior. As an echinoderm, starfish have some unique characteristics, such as the performance of the body, spines, no head and so on.
