The review of the blue pla net by BBC Our earth actually is a blue planet, which is covered with 71 percent of the world by brine. How vast such superficial content! Therefore, the mysterious field is composed of numerous parts, such as various marine animals and manydifferent plants. This means a truth that we can ' t neglect the effects alerted on the ocean by the creature and some terrestrial beings along the coast. Food lin ks, complex food n et, describe relati on ship running through the ani mal-k in ds, from pla nkton to the hugest sort, blue whale, approximately. To my surprise, blue whales, such a formidable giant, rely on millions of krill. Such gargantuan harvests depe nd on the con ti nuing fertility of the ocea n. There exists much amaz ing associati on betwee n two species like this. Gen erally, grey whales are much bigger than killer whales. But 15 killer whales can trace an adult female grey whale several kilometers just for her baby. They chase the young un til he can ' t swim any Ion ger because of toil. Whales breathe with lung, as is known. These killer whales try their best to press the baby grey whale to make his head in the sea. At last, the young whale dies of oxygen-poor. His mother can not do anything about it and continue her journey north for food, leavi ng the child ' s body behind. She has no choice to give up the one who she had con ceived for thirtee n mon ths. Moreover, the living in the water is usually classified according to their ambient livi ng en vir onmen t. I n the abyssal area, large ranks of tran spare nt lives lead a rich and varied life. Among the group, imitati on is a n ecessary skill to con fuse the enemy and attain what they want. These guys may imitate the surroundings or just copy the color around them. Somefish have special luminous organs, which function as viewfinders, hiding in the dark. They reflect the weak blue light from water surface and slightly disappear along with it. Some striped mullets and jellyfish have the ability to flash like neon light. Their moti on is excelle nt in disguise. Most of them move slowly relatively. As the depth rises, the quantity gradually with the sun light brighte ning and en ergy stre ngthe ned. of living grow In the shallow sea, battles happe n every day almost. Various ani mals join in the cruel conflict. As is commonly seen, bands of sardines used to take action together for safety. It ' s not, n evertheless, an ideal method. Bottle nose dolph in and whales uninten ti on ally work in conj un cti on with each other. Dolph ins are in charge of getting the sardines apart, making use of waves foam. Whales can enjoy the dish much more easily. Smart seabirds fly low, pressing close to the water, to find the best location to seize the prey. After that, they rush into the water like spurting arrow. The hun ters grab their relish to the habitat. Mean time, besides food link, there coexists symbiosis. Sea-gull and half-m oon can help other fish by cleaning the mould on the cover. What is vividly introduced above occurs in the diverse layers, while the layers are not alone, in touch with each other in stead. Ocea n curre nt becomes the key factor to mix the brine from distinct areas. Nutrition blends to a new balanee. Of course, this results in energetic fishing ground. Fish shuttle up and down, making water world filled with vitality and more oxygen dissolved. The ocean is an organic whole in the long term, in spite of the pole and equator. Low degree represents a flinty challenge in the pole. Even an animal of large scale may face fatal attacks tha nks to the jam result ing from the freez ing cold weather. Near an ice hole lives a polar bear. Through the hole, white whales keep breathing during the past half year. The bear obtain some trophies by overwhelming these whales trapped in the hole. Harp seals give birth to their babies on the ice pieces, partly due to that reason. Coming to the next summer, generations fly back from the south. 本文来源：https://www.wddqw.com/doc/5cbb2857ee3a87c24028915f804d2b160a4e86d8.html