Habits People generally think of sharks as ferocious predators in the ocean. But who would have thought that the starfish, which usually remains motionless on the sandy bottom of the sea or on the reef, is also a predator? But that's actually what they are. Because the starfish is not as agile and swift as sharks, its main predators are slower-moving marine animals such as shellfish, sea urchins, crabs and sea anemones. It often adopts the strategy of slow meandering when hunting, slowly approaching the prey, catching the prey with the tube feet on the wrist and wrapping the whole body around it, spitting the stomach pouch out of the mouth, and utilizing the digestive enzymes to let the prey dissolve outside its body and be absorbed by it. The starfish has an eye spot at the end of its carpals, which is its light-sensing area. There are many on the starfish that can detect food sources in the water and find food quickly. We The starfish is known to be an integral part of the marine food chain. Its predation plays a role in maintaining the balance of the biota. For example, on the west coast of the United States, there is a species of sea star that preys on sea rainbows that are densely clustered on the reefs. This prevents overpopulation of sea rainbows and prevents them from encroaching on the territories of other organisms, thus maintaining the balance of the biota. There are about 2,000 species of starfish distributed worldwide over a wide area from the sea floor to the sea floor. The largest number of species are found in the northeastern Pacific waters from Alaska to California. In the natural food chain, there is often a life-and-death struggle between predator and prey. In order to escape starfish predation, prey animals almost always have an evasive response. One large sea cucumber, when touched by a starfish, rolls violently in the water and escapes before the starfish can get a firm grip on it. The scallop also has a unique technique of avoiding the starfish, as it swims away quickly when the starfish comes near it. A small sea anemone breaks away from the reef on which it is clinging whenever a starfish approaches and drifts with the waves to safety. The ability of these animals to escape has evolved over time. They have avoided being eliminated by nature. The starfish is a carnivorous echinoderm that feeds mainly on shellfish. Not only is it a big eater, but it's also voracious. A small starfish of only one month old can eat more than 50 small sea roaches in 6 days, and it kills its prey as soon as it meets them, so it causes great harm to the shellfish farming industry such as coastal oysters and tamarind (i.e. mussels), and fishermen hate them very much. Since the starfish has little economic value, fishermen generally dry them and grind them into powder for fertilizer.

Although the starfish is a ferocious predator, they are gentle with their offspring. After laying their eggs, starfish often erect their wrists, forming an umbrella that allows the eggs to hatch inside so that they are not preyed upon by other animals. The hatchlings drift around in the sea, feeding on plankton and eventually growing into starfish. It is not uncommon to see empty shells with flaccid bivalves, mostly the remains of shellfish that have been killed by starfish.