What kind of animal is the Risso’s Dolphin? Explanation of its characteristics, ecology, and habitat. Dolphins you can see at the aquarium.


What kind of animal is a Risso’s Dolphin? We will explain its characteristics, ecology, and habitat. This dolphin is a rare animal that is hard to see even in aquariums. It grows to a huge size of about 3m in length, so it is difficult to keep it as a pet, but it puts on a very flashy performance in dolphin shows.

What is a Risso’s Dolphin? Basic Stats

Risso’s dolphins are marine mammals belonging to the Delphinidae family and the Risso’s genus. They are large dolphins that can grow to 3-4m in length and weigh 300-600kg. Their kanji characters are flower giant heads, their scientific name is Grampus griseus, and their English name is Risso’s dolphin. The list of information is as follows:

English(英名)Risso’s dolphin
scientific name(学名)Grampus griseus
classification(分類)Mammalia、Odontoceti、 Delphinidae、Grampus


Risso’s whales live in temperate and tropical seas around the world, so they are distributed worldwide. They seem to like warm seas, and prefer the open ocean rather than coastal waters. The minimum water temperature is 10°C, and they tend to prefer 15°C or higher.

What are its characteristics? What kind of creature is it?

Risso’s whales have a sturdy upper body that tapers toward the caudal peduncle. They have a round head and no beak. They have a high, sickle-shaped dorsal fin, long pectoral fins, and a body color that ranges from gray-white to dark gray. They turn white with age. They are actually quite different from pilot whales, as they have no teeth on their upper jaw. They have many scratches on their bodies that make them look like they have lots of flowers in bloom, hence the name “flower” pilot whales.

What is their personality like?

Risso’s whales are very social animals that value discipline. They are usually seen in groups, but often act alone.

What is their ecology like?

Risso’s whales live by eating fish, crustaceans, invertebrates, etc. Their lifespan is about 40 years.

Do they have any natural predators?

Killer whales are the biggest threat to Risso’s whales.

Are Risso’s dolphins endangered?

Risso’s dolphins are not endangered when viewed as a whole. They are kept in aquariums around the world and occasionally appear in dolphin shows. The population is said to be 60,000 along the coast of the United States, 170,000 in the eastern Pacific, and 80,000 in the western Pacific.

Can Risso’s dolphins be kept as pets?

Risso’s dolphins are too large for ordinary people to keep as pets. If you’re looking for one, we recommend visiting an aquarium or other place to view them and getting guided or guided by events.


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