Anemone (Anemone), an order of six phobias. Although anemones look like flowers, they are actually predators. such

Invertebrates have no bones and rely on fixed objects such as rocks and corals. They can move very slowly. Anemones live a long life. Hermit crabs sometimes carry Shanghai anemones as camouflage. 1 Actiniaria, Six Corallinae. * * * There are more than 1000 kinds. Widely distributed in the ocean. Generally, it is single, boneless and fleshy, and it is named after its appearance like sunflower. The center of the mouth plate is the mouth, and there are tentacles around it, ranging from a dozen to more than a thousand, such as anemones on coral reefs. Tentacles are generally arranged in multiple circles according to multiples of 6 and 6, which interact with each other; Mr. Inner Ring is older and Mr. Outer Ring is younger. The tentacles are covered with stinging cells to defend against enemies and prey. Most anemones' substrates are fixed, and sometimes they can move slowly. A few have no floor and live on the muddy seabed. Some anemones can swim in the water with their tentacles.

Two rows of slender tentacles of anemones spread out radially, swinging above the digestive cavity, not only like blooming flowers, but also very beautiful, waving to those curious fish frequently. Although you can't take the initiative to get the prey, it is even light when its tentacles are stimulated.

Looking for food

With a light sweep, you can catch the victim mercilessly. Anemone tentacles are covered with barbs, which can pierce the meat of prey. Its body wall and antennae have stinging cells, which are a special toxic organ that can secrete a venom to paralyze other animals for self-defense or feeding. The bright and touching tentacles of anemones are actually a terrible honey trap for small fish. The venom secreted by anemones is harmless to human beings. If we accidentally touch their tentacles, we will be slapped and feel stinging or itchy. If you take it back and cook it, it will cause poisoning such as vomiting, fever and abdominal pain. So anemones can neither be touched nor eaten. Simple animals generally concentrate all their energy on transporting food to the central digestive system to fully meet their own survival needs. Anemone's simple nervous system ability is extremely limited. Anemone has a strong ability to stretch roots. There are well-developed sphincter muscles at the base of the oral plate, and well-developed contraction muscles and extensor muscles at the body wall for cylindrical contraction or extension. When in danger, the body will contract, empty the water in the tentacles, and take back the mouth plate and tentacles. Anemones can't stretch out their tentacles until they complete the whole contraction process. Because it takes two and a half hours to complete this process, anemones can't recover in two and a half hours. In this way, attackers often lose patience and give up the invasion before anemone tentacles reappear.