Question

Отличие морских млекопитающих от рыб?

Answer 1

Difference between Marine Mammals and Fish

Marine mammals and fish are both aquatic creatures, but they have several key differences. Here are some of the main distinctions:

1. Body Structure: - Marine mammals have a streamlined body shape, often with a layer of blubber for insulation and buoyancy. This allows them to maintain body heat and stay afloat in the water. - Fish have a streamlined body shape as well, but they lack blubber and rely on other adaptations, such as scales and fins, for movement and protection.

2. Reproduction: - Marine mammals give birth to live young and nurse them with milk produced by mammary glands. They are classified as mammals because they have hair or fur, breathe air, and have internal fertilization. - Fish, on the other hand, lay eggs and undergo external fertilization. They do not nurse their young with milk.

3. Respiration: - Marine mammals are air-breathing animals and have lungs to extract oxygen from the air. They need to come to the water's surface periodically to breathe. - Fish, on the other hand, have gills that extract oxygen from the water. They can extract oxygen from the water as it flows over their gills.

4. Mobility: - Marine mammals have a wide range of mobility in the water. They can swim using their powerful tails and flippers, and some species can even move on land. - Fish use their fins and tails to swim in the water. They are generally more agile and maneuverable in the water compared to marine mammals.

5. Taxonomy: - Marine mammals belong to the taxonomic group called Mammalia, which includes animals such as whales, dolphins, seals, and sea lions. - Fish belong to the taxonomic group called Pisces, which includes a wide variety of species such as sharks, rays, and bony fish.

These are just a few of the key differences between marine mammals and fish. Each group has its own unique adaptations and characteristics that allow them to thrive in their respective aquatic environments.