Dolphin is a mammal.

Dolphins are fascinating creatures that inhabit the oceans and seas. While they may look similar to fish, they are actually a type of mammal. Here is a detailed explanation of why dolphins are classified as mammals:

Classification of Dolphins:
- Kingdom: Animalia
- Phylum: Chordata
- Class: Mammalia
- Order: Cetacea
- Family: Delphinidae

Mammalian Characteristics:
Dolphins possess several characteristics that classify them as mammals rather than fish or amphibians. These characteristics include:
1. Warm-Blooded: Dolphins are warm-blooded, which means they can regulate their body temperature internally. Unlike fish, which are cold-blooded, dolphins maintain a constant body temperature regardless of the surrounding water temperature.
2. Mammary Glands: Female dolphins have mammary glands that produce milk to nourish their young. This is a distinguishing feature of mammals as fish and amphibians do not have mammary glands.
3. Hair: While dolphins do not have a full coat of hair like other mammals, they do have small amounts of hair around their snouts, which are remnants of their evolution from land-dwelling mammals.
4. Lungs: Dolphins have lungs and breathe air, just like humans. They must come to the water's surface to breathe, unlike fish that extract oxygen from the water through gills.
5. Live Birth: Dolphins give birth to live young, which is another characteristic of mammals. Fish and amphibians lay eggs, but dolphins do not.

Adaptations to Aquatic Life:
Although dolphins are mammals, they have evolved various adaptations to thrive in an aquatic environment. These adaptations include:
1. Streamlined Body: Dolphins have a streamlined body shape that enables them to swim efficiently through the water.
2. Blubber: They have a thick layer of blubber beneath their skin, which provides insulation and buoyancy in the water.
3. Fins and Flukes: Dolphins have pectoral fins and a powerful tail fluke that help them maneuver and propel themselves through the water.
4. Blowhole: Dolphins have a blowhole on top of their heads, which allows them to breathe when they surface.

In conclusion, dolphins are classified as mammals due to their warm-blooded nature, possession of mammary glands, presence of limited hair, ability to breathe air using lungs, and giving birth to live young. Despite their adaptations to an aquatic lifestyle, these characteristics clearly distinguish dolphins from fish and amphibians.

Answer is a because dolphins are like fishes as they live in water but every living thing that lives in water is a fish . So , dolphins are mammals. By the way dolphins give young ones not eggs as mostly fishes give eggs.


SO the answer is option A) A mammal