10 Apr / 2011
Author: Two Fish Blog Tags: Comments: 0


It is very common to see dolphins from the boat in Bunaken national park. We have 7 different kind of dolphins, however very rarely we can see them when diving, there are quite shy animals and they don’t like bubbles :(

It is the second time in one month that this happen! This time our guest Osgrid was the lucky one in Lekuan II dive site.

Top 12 Facts about Dolphins that you must know

1. Dolphins are mammals.

As all mammals, dolphins nurse their young from mammary glands.


However they are mainly shallow divers as they need to reach the surface to breathe.

3. Dolphins can stay up to 15 minutes under water.

They only do this some times as they usually stay only a few minutes diving before reaching the surface for air.

4. Dolphins use a technique called echolocation.

This technique uses the same principles of a radar, and it is used to find food and navigate.

5. Dolphins are social beings.

Dolphins live in groups and cooperate among each other for activities like getting food and calf rising.

6. Dolphins are Cetacenas.

There are 32 species of ocean dolphins and 5 species of river dolphins.

7. The largest dolphin is the Orca, also known as “killer whale”.

Orcas grow up to 6.1 meters long and they are named as whales because their size, but they really belong to the toothed cetacean family just like dolphins do.

8. The most popular dolphin is the “bottlenose dolphin”.

Bottlenose dolphins are the ones we have seen in tv series, movies and aquatic shows. Bottlenose dolphins can grow up to 2.5-2.8 meters.

9. Dolphins are warm-blooded.

As mammals, dolphins are warm blooded and their internal temperature is around 36 degrees. To conserve this temperature they are surrounded by a thick layer of fat called “blubber” just below the skin.

10. The botllenose dolphin brain weighs 1500-1600 grams.

While average human brain weighs 1200-1300 grs. This is not a conclusive evidence of dolphin intelligence as many other factors might be the cause of intelligence according to scientists.

11. Dolphins communicate efficiently.

Dolphins can make a unique signature whistle that may help individual dolphins recognize
each other, collaborate and perform several other kinds of communication.

12. Dolphins can swim 5 to 12 kilometers per hour.


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