What are the animals in the sea? What kind of animals are in the sea?

There are turtles, dolphins, starfish, walruses, seahorses, squid, squid, blue whales, killer whales, blue-ringed octopuses, humpback whales, sperm whales, and other animals in the sea.

1.Sea turtles: belong to the order of 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.

2.Starfish: It is the most representative group of echinoderms with structural physiology.

The body is flattened, mostly symmetrical with five radiations, and the demarcation between the body disc and the wrist is not obvious. When living, the mouth faces down, and the mouth faces up. The ventral side of the belly has a step groove, and the groove protrudes from the tube foot.

The plates of the endoskeleton are connected by connective tissue and are flexible and flexible.

3.Dolphins: with morphological traits typical of toothed cetaceans:

spindle-shaped body; a single crescent-shaped breathing hole; skull intussusception, postmaxillary extension overlapping the frontal bone; left-sided asymmetry of the cranial parietal; conical or nail-shaped teeth, etc. The most obvious variations are related to feeding organs such as beaks, upper and lower jaws, and teeth.

4.Walrus: An animal of the genus Walrus in the family Walrusidae. As the name suggests, the elephant in the sea has a large body, wrinkled skin, sparse bristles, small eyes, and poor eyesight. It has two long teeth.

5.Seahorse: It is a general term for several small fish species of the family Hydrosauridae of the order Thornfish, and is a small marine animal with a length of 5-30 cm.

It is named because the head is bent and the body is close to a right angle, the head is in the shape of a horse's head and forms an angle with the body, the snout is long and tube-shaped, the mouth is small, and the dorsal fin is one, all of which are composed of fin bars. The eyes can move independently.

6.Squid: also known as soft fish, spear squid, is an animal of the mollusc phylum Cephalopoda Sheath subclass Decabrae Cyclophyta Squid Eye-opening suborder.

The body is conical, pale, with light brown spots, a large head, 10 tentacles in front, and a triangular fleshy fin at the end of the tail, often swimming in groups in the ocean at a depth of about 20 meters.

7.Blue whale: is a marine mammal that belongs to the suborder Baleen Whales.

There are four subspecies. The blue whale is believed to be the largest animal known to have ever survived on Earth, reaching up to 33 meters long and weighing up to 181 tons. The blue whale has a slender body and a blue-gray back, although it can sometimes be lighter in the water.

The animals in the sea include seahorses, sharks, jellyfish, tuna, crabs, squid, octopus, turtles, oysters, whales, abalone, hairtail, white minnows, pressed minnows, redfin fish, tench hookfish, dolphins, sea lions, sunfish, sea snakes, etc.;

There are plants in the sea such as cyanobacteria, red algae, brown algae, green algae, coral, kelp, sponge, spirulina, rotula, etc.

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 large marine organisms belong to 5 biota 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%.