What creatures are affected by the sea

It's a strange question, because all living things are affected by the sea. Because, according to the current saying, life originated in the ocean.

But I think the answer you want is probably whales, because whales are mammals, but after entering the ocean, it has changed a lot.

Whales, although they look like fish, are not fish, but are a class of mammals, similar to the situation of bats that are like birds but are not birds, but are also a class of true mammals. Unlike fish, whales are viviparous, generally giving birth to one litter per litter, and the cubs are raised by the mother's milk; Fish are oviparous and can lay thousands of eggs at a time, and once hatched, young fish can live independently without lactation. The whale's body temperature is constant, on average, whether in cold waters or tropical sea areas; Whereas, fish are ectotherms, and their body temperature varies with the change in ambient temperature.

Whales breathe with their lungs and need to surface frequently for ventilation. Fish, on the other hand, use their gills to absorb oxygen dissolved in the water and stay underwater. The similarity in appearance between whales and fish is due to the fact that they have been living together in the same living environment for a long time, which is a "convergence phenomenon".

Fiddler crabs, turtles, seabirds, and more.

Humans, blood salt concentrations, ancient ocean salt concentrations are also, proving that humans also evolved from the sea.

Life in the ocean is affected by changes in the marine environment.

Personally, I think there are many marine creatures. Because the creatures on land are better than those in the ocean, these creatures on land are almost complete, but the ocean is different.

Among the known organisms, the largest variety is marine animals, with 16.2 million species, distributed in dozens of phyla of the animal kingdom. There are more than 10,000 species of marine plants, mainly low-grade marine algae, and only more than 100 species of high-level marine seed plants. There are less than 500 species of marine fungi.

There are many types of marine bacteria.

Second, we all know that the oceans occupy more of the Earth than the land. And in the depths of the ocean, where our technology has not yet reached, there are always some creatures that we don't know living in the world that we can know.

: Marine plants: more than 10,000 species Marine animals: 16.2 million species.

There are currently 15,304 marine fish species registered in the world, and about 20,000 marine fish species are expected to be in the end. There are currently 210,000 known species of marine life, and the actual number is expected to be more than 10 times that number, or 2.1 million species.

After decades of investigation and research by marine science and technology workers, China has recorded 20278 in the waters under China's jurisdiction

species of marine organisms [1].These sea creatures belong to 5 kingdoms and 44 phyla. Among them, the animal kingdom has the largest number of species (12,794 species) and the prokaryotic kingdom has the least (229 species).

China's marine biological species account for about 10% of the total number of marine biological species in the world, and the number accounts for 50%.

What is the largest marine life on Earth.

The plants in the sea are: cyanobacteria, red algae, green algae, spirulina, brown algae, coral, kelp, etc. The animals of the sea are:

Sponges, sharks, jellyfish, seahorses, tuna, squid, octopus, turtles, oysters, whales, abalone, hairtail, white minnows, minnows, redfin fish, tenchfish, sunfish, dolphins, sea lions, crabs, sea snakes, etc.

Blue-green algae, also known as blue-green algae, is a class of large single-celled prokaryotes with a long evolutionary history, negative Gram stain, flagella, chlorophyll a, but no chloroplasts (algae different from eukaryotes), and oxygen-producing photosynthesis.

Sponges are the most primitive multicellular animals, which have lived in the ocean 600 million years ago and have developed to more than 10,000 species, accounting for 1 15 of the marine animal species, and are a huge "family". Except for about 20 species of spongilla, which are freshwater, they are all distributed in the intertidal zone of the sea and the ocean to a depth of 8,500 meters (more than 28,000 feet), and live a sedile life.

Sharks are fish in the ocean. Sharks have been on Earth since 300 million years before the appearance of dinosaurs, and they have been around for more than 500 million years, and they have barely changed their chain for nearly 100 million years. Sharks, known as sharks, sharks, and sand fish in ancient times, are behemoths in the ocean, so they are called "wolves in the sea".

There is a wide variety of marine life in the depths of the seabed, and the depths of the seabed are a large ecosystem. So there are a lot of creatures that have never been seen on land. This is a manifestation of biodiversity.

I think it's a habit that is unique to these creatures, and it's also a natural phenomenon, but I think it's related to environmental factors, so we have to look at it sensibly.

This is because the creatures in the depths of the sea are very diverse, so they also have a variety of appearances. It is mainly related to the environmental background.

The earth is also known as the "water ball" because the entire earth occupies only about 30% of the land area, and the rest is the ocean. The ocean is much larger than the land, and there are many more creatures in the ocean than on the land, so why is there no civilization in the ocean? Here's my personal opinion.

1. "Bigness" is not a necessary factor for the emergence of civilization. In the vast universe, the humans of the earth have not found other planets suitable for life, and many planets are larger than the earth. There are many accidental factors in the creation of human beings, and it does not mean that as long as there is a planet, human beings can be produced.

The size of the planet does not affect the creation of human beings. Therefore, even if the ocean occupies ninety percent of the earth's area, human civilization may also be produced on land.

Second, the environment in the ocean is unstable. Although there are some natural disasters such as typhoons, **, floods and other natural disasters on land, in general, the land environment is relatively stable. In the ocean, the movement of currents, tides, etc. are often occurring, and it is almost impossible to build a house on the bottom of the sea.

3. No fire can be lit in the sea. Fire plays an important role in the progress of human civilization. However, in the environment of the seabed, making a fire has become a problem, the fire cannot be lit, the food cannot be cooked, and it is difficult for civilization to advance.

Fourth, the oxygen content in the sea is not as good as that on land. The human brain is much larger than many animals, and this is because humans are intelligent creatures, and the more intelligent they are, the bigger the brain. The brain has a higher demand for oxygen, and the oxygen content in the sea is lower.

5. The underwater world is a multi-dimensional world, with the seabed, the sea, and the sea, while the land is a two-dimensional space. It's hard to draw boundaries in the underwater world, how to say that? Even if there were intelligent creatures in the sea, it was hard to imagine how they would live.