Sea lion dolphin Detailed description, are dolphins the same as sea lions

It's not the same. Dolphins have morphological traits typical of toothed cetaceans: a spindle-shaped body; breathing orifice single crescent-shaped; skull intussusception, with the maxilla expanding posteriorly and overlapping the frontal bone; left-sided asymmetry of the cranial parietal; conical or nail-shaped teeth, etc.

Sea lions include 7 species in 5 genera. Distributed in the Northern Hemisphere. They are small in size and generally do not exceed 2 meters in length.

The northern sea lion is the largest species of sea lions.

Sea lions have a gentle temperament and are active in many groups, and can form large groups of thousands of animals on land and 1 or more at sea. Poor vision, but sensitive sense of hearing and smell. The food is mainly benthic fish and cephalopods.

Females give birth to only 1 litter per litter, and the cubs are about 100 cm long and weigh about 20 kg at birth, reaching sexual maturity at the age of 3-5 and living for more than 20 years.

First, the body type is different.

Dolphins: Dolphins have a body length of meters and weigh 50,7000 kilograms.

Sea lions: Sea lions are generally no more than 2 meters long and weigh 40-200 kilograms.

Second, the color is different.

Dolphins: Dolphins have complex spots of black and white or black, white and gray.

Sea lions: Sea lions have a yellowish-brown body color, a lighter back coat, and a darker chest and abdomen.

Third, the head is different.

Dolphins: Dolphins have a raised forehead and a shorter beak.

Sea lions: Sea lions have a flat forehead, a medium-long snout, and a long snout.

Fourth, the food is different.

Dolphins: Dolphins feed mainly on fish and squid.

Sea lions: Sea lions feed mainly on demersal fish and cephalopods.

Named for its resemblance to the face of a lion, the sea lion is a marine mammal that belongs to the same pinniped class as the seal, because its limbs have evolved into fins, making it easy to move around the ocean.

Dolphins (scientific name: delphinidae) are aquatic mammals closely related to whales and porpoises, and live widely in shallow seas near the continental shelf, occasionally in freshwater. Dolphins include more than 60 species in more than 20 genera, of which the dolphin family is the largest family of cetaceans, which evolved about 10 million years ago in the Miocene.

The various species of dolphins range in length from meters to meters and weigh from 40 kilograms to 10 tons, and they feed mainly on fish and mollusks. Dolphins are one of the most intelligent animals, and they have always been very popular in human culture due to their friendly appearance and playful personality.

This one is completely different, the sea lion is very **.

It's not the same. Sea lions are larger.

It is inevitable that sea lions will go ashore to give birth, and dolphins will give birth in the water, dolphins will live in the water for their entire lives, and sea lions spend one-third of their time on land.

They all belong to the pinniped class. Pinnipeds can be divided into three families: the family Phocidae, which has a completely vestigial outer earshell, the Otariidae family, which has very small earshells, and the Odobenidae

The front feet of seals are shorter than those of the hind feet, and the hairy fin feet have nails, and the nails are 5 sites. The ears become extremely small or degenerate to only two holes, which can be opened and closed freely when swimming. When swimming, it mostly relies on its hind feet, but its hind feet cannot bend forward, and its heels have degenerated from sea lions and fur seals, so when it walks on land, it always drags its cumbersome hind limbs, bends and crawls its body, and leaves a line of twisted marks on the ground.

Seal characteristicsSeals belong to the order of pinniped mammals, with a streamlined body, short, smooth fur, and strong resistance to wind and cold. It can both live in water and land to perch, feeding on marine life, mainly krill. It is a good swimmer, good at diving, and in the water it steers with its pectoral flippers and its tail flippers as oars.

Sea lions mammals, pinnipeds, fur seals. The limbs are fin-shaped, and the hind limbs can be turned forward to support the body; There are ear shells; tail very short; The body is coarsely hairy, and fine hairs are scarce. Males are 2 5 to 3 25 m long, depending on the species; The female is smaller.

Like other mammals, sea lions have the same characteristics as other mammals, such as respiration with lungs, viviparity, and constant temperature. The roar of the sea lion is like that of a lion, and the neck of some species has a mane, which is quite like a lion, so it is called the "lion king of the sea". Its four legs are like fins, making it ideal for swimming in water.

The sea lion's hind feet can bend forward, allowing it to walk nimbly on land and crouch on the ground like a dog. Seals, on the other hand, have their hind limbs that are constantly stretched backward and cannot bend forward, so they cannot walk on land.

The poster is the same as the newspaper, there are several groups of dolphins.

Different physiques, different living habits, and different living areas.

1. Dolphins, which are closely related to whales and porpoises, evolved in the Miocene about 10 million years ago, and widely lived in shallow seas near the continental shelf, occasionally seen in freshwater. Various species of dolphins range in length from meters to meters and weigh from 40 kilograms to 10 tons, and feed mainly on fish and mollusks. There are 18 species of dolphins known to be in Shoga off the coast of China.

2. Sea lions, repentant skin traces are mammals, including 5 genera and 7 species. Distributed in the Northern Hemisphere. They are small in size and generally do not exceed 2 meters in length.

The northern sea lion is the largest species of sea lions. Males are 310-350 cm long and weigh more than 1000 kg. Sexual adults have long, thick manes around the neck and shoulders, yellowish-brown body hair, lighter dorsal hair, and darker chest and abdomen.

Females are lighter than males and have no mane. The face is short and broad, the snout is blunt, and the eyes and outer ear shells are small. The forelimbs are longer and wider than the hindlimbs, the first toe of the forelimbs is the longest, and the claws are vestigial.

The lateral toes of the hind limbs are blue, and the middle three toes are long and wide, and the middle three toes have claws.