What animals are in the sea? What animals are in the sea

Animals in the sea include seahorses, sharks, jellyfish, tuna, crabs, squid, octopuses, turtles, oysters, whales, abalones, hairtails, whitefish, minnows, redfin fish, tenchfish, dolphins, and sea lions.

After decades of investigation and research by marine science and technology workers, 20,278 species of marine organisms have been recorded in the waters under the jurisdiction of China. 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%.

Marine animals are a general term for heterotrophic organisms in the ocean. The ocean is an important life support system, and marine animals are an important part of the biological world.

The animals of the sea are: there are more than 200,000 species of marine animals, and they have a variety of forms, ranging from microscopic single-celled protozoa to higher mammals - cetaceans; Marine animals can be divided into three large groups: marine invertebrates, marine protochordates, and marine vertebrates.

1. Sharks. 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 in 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".

The conventional wisdom is that sharks' cartilage (i.e., shark fins) is high in protein, but this is wrong.

Eggs have far more protein than shark fin. In addition, studies have shown that sharks are prone to mercury accumulation and shark fins contain a certain amount of neurotoxins, which are potentially harmful to humans. Sharks are at risk of extinction because of decades of mass hunting.

2. Whales. Whales are divided into two categories, one is baleen whales and the other is toothed whales. Whales belong to the phylum Chordates, subphylum vertebrates, mammals, and eumatria, which contain about 98 species of viviparous mammals living in oceans and rivers.

There are more than 30 species in China's waters. All but a few species of whales live in freshwater, and all but a few inhabit the ocean. The definition of the whale itself is vague, and the whale can encompass all cetaceans, as well as specific families of cetaceans. All dolphins are also included in the whales.

3. Octopus Octopus: It is the common name of 252 species of marine mollusks in 26 genera of the octopus family. It is the largest family of cephalopods, which can be divided into the subfamily of deep-sea myriapods, the subfamily of Aerdoudae, the subfamily of cephalopods and the subfamily of cephalopods.

The body is ovate or oval, muscular, the mantle cavity has a narrow opening, and the body surface is generally without water holes. Wrist suction cups 1 or 2 rows.

The third carpal stemmed on the left or right side of the male, with a seminal groove on the ventral margin of the wrist and a spoon-shaped lingual lobe at the end; The stemmed wrist cannot be self-broken. Funnel jacket lock degraded. 1 pair of vestigial needle-like inner shells or no inner shells. If there is a toothed tongue, the teeth on the side of the tooth tongue are usually single-cuspid. The stomach and cecum are located at the back of the digestive glands.

Fourth, jellyfish. Jellyfish: It is an important plankton in the aquatic environment and belongs to the class of spinophiles.

Jellyfish are a very beautiful aquatic animal. Its body is shaped like a transparent umbrella, and the diameter of the umbrella body can be large and small, and the diameter of the umbrella body of the large jellyfish can reach 2 meters. The edge of the umbrella has a number of whisker-like tentacles, some of which can be up to 20-30 meters long.

5. Sea turtles. Sea turtles belong to the order Turtles, Turtles, and Turtles. It is widely distributed in the Atlantic, Pacific and Indian oceans.

Chinese sea turtles are found in the coastal waters of the Beibu Gulf from Shandong in the north to the south of the Beibu Gulf. It can be more than 1 meter long and has a lifespan of about 150 years. There is a pair of forehead scales on the top of the head.

The limbs are like oars, the forelimbs are longer than the hind limbs, and each has a claw on the inside. The head, neck, and limbs cannot be retracted into the nail. Feeds mainly on seaweed.

Encyclopedia — Sharks.

Encyclopedia – Whales.

Encyclopedia — octopus.

Encyclopedia — Jellyfish.

Encyclopedia — Sea turtles.

A general term for heterotrophic organisms with very different morphological structures and physiological characteristics of various phyla in the ocean. They do not photosynthesize, cannot synthesize inorganic matter into organic matter, and can only feed on plants, microorganisms and other animals and their organic detritus matter.

There are more than 200,000 known species of marine animals, ranging from microscopic single-celled protozoa to higher mammals such as cetaceans. It is widely distributed, from the equator to the polar seas, from the sea surface to the depths of the seabed, from the coast to the bottom of the trench in the ultra-abyss. Marine animals can be divided into three large groups: marine invertebrates, marine protochordates, and marine vertebrates.

Animals in the sea are seahorses, sharks, jellyfish, tuna, crabs, etcSquid, octopus, turtles, oysters, whales, abalone, hairtail, whitefish, minnows, redfin fish, tenchfishDolphins, sea lions, etc.

There are plants and cyanobacteria in the sea.

Red algae, brown algae, green algae, coral, kelp, sponge, spirulina.

Rotunda and so on. The animals and plants in the sea are also interdependent. After the death of an animal, the carcass decomposes to become the nutrition of plants, and many plants are the food of animals. It is the harmony of animals and plants in the sea that makes for the perfect ocean.

Marine life:Marine life refers to the species that are living in the ocean, including marine animals, marine plants, microorganisms and viruses. According to the distribution of marine organisms in China's waters, they can be roughly divided into two categories: marine organisms in waters and marine organisms in tidal flats.

Among the marine life in the water, fish, cephalopods (such as the cuttlefish, also called cuttlefish) and shrimp and crabs are the most important marine organisms. Among them, fish have the largest variety and quantity, and constitute the main body of marine life in the waters.

Sea lions, sharks, turtles, crabs.

There are whales, sharks, crabs in the sea.

In the sea: sharks, seahorses, tuna, blue whales, giant crabs, killer whales, manta rays, king squid.

1. The blue whale, a marine mammal, is considered to be the largest animal known to have ever survived on Earth, reaching a length of 33 meters and weighing 181 tons. The blue whale has a slender body and a blue-gray back, although it can sometimes be lighter in the water.

2. Giant crab, the largest crustacean in existence, has a dark orange body, ten long limbs, white spots, and the first two limbs of the tomato develop into chelae. The largest specimen was 38 cm long at the back of the leg, weighed 20 kg and had a lifespan of 100 years. Two compound eyes grow in front of the body with two spines in between.

3. Killer whale, a large toothed whale, with a length of 8-10 meters, a weight of about 9 tons, a slightly round head, and an inconspicuous beak;The dorsal fin is tall and erect, curved up to 1 meter, the maximum length recorded is meters, and it weighs 9524 kg.

4. Double-snouted anterior manta ray, with a wingspan of 5 6 meters and the longest up to 9 meters. Back body color black to gray-blue. The underside is white with gray spots that can be used to identify different individuals. **Rough and scaly shark-like, with an extremely wide disc with pointed horns, and a disc width twice the length of the disk.

5. King squid, also known as giant spear squid, is a typical deep-sea giant squid, the largest of the same species, the world's largest invertebrate, mostly inhabiting the deep sea around 2,000 meters around the Antarctic sea.

Some of the animals in the sea are: marine mammals, marine reptiles, marine arthropods, marine mollusks, marine fish and so on.

1. Marine mammals.

Marine mammals are a special group of mammals adapted to marine environments, and are often referred to as sea beasts. It is a vertebrate in the ocean that is viviparous, lung-breathing, constant body temperature, streamlined, and has fin-shaped forelimbs. Marine mammals mainly include cetaceans, pinnipeds, and manatees.

There are 39 species of sea beasts in China. They all return to the ocean from land and belong to sub-aquatic organisms. It is a swimming organism.

2. Marine reptiles.

Marine reptiles refer to reptiles that can survive in the ocean. It is a group of reptiles that have adapted again to an aquatic or semi-aquatic environment. The two most common marine reptiles found in continental shelf waters are sea turtles and sea snakes, both of which are cold-blooded, so populations of both animals are rapidly decreasing from the tropics to the poles.

3. Marine arthropods.

The arthropods in the ocean are divided into four major groups: Limbs, Sea Spiders, Insects, and Crustaceans. The most important of these are the crustaceans, which are further divided into cephalic shrimp, branchiopods, paddlepods, microshrimps, jawsopods, mesomorphs, and molluscs.

4. Marine mollusks.

In the underwater world, there is an animal that can make a "house" for itself, and they can secrete calcareous matter from their own body as a building material to build a "house" and use it as their own habitat, these animals are shellfish. Because of their soft body, they belong to mollusks.

5. Marine fish.

Marine fish are distributed from the poles to the equatorial seas, from the coast to the ocean, from the surface layer to the abyss of about 10,000 meters. The diversity of living environments contributes to the diversity of marine fish. But due to the same lifestyle.

It produces a series of common characteristics: gills that breathe dissolved oxygen in water, fin-like limbs that facilitate movement in water, and mucus that secrete mucus to reduce resistance to movement in water. In addition, it has its characteristics in terms of body structure, reproduction and growth, feeding nutrition, and exercise.