Behavior
Diving is very frequent for this dolphin species. Every 70 to 150 seconds they have to come up for air. Often, it is only the head and perhaps the body that is seen when they surface for air. It is very seldom that you will see the Irrawaddy Dolphin with the tail out of the water. They aren’t seen as being as active as many of the other species.
They also tend to live in pods with smaller numbers than other dolphins. They are highly social but there may be from 3 to 6 members per pod. They are very curious about their surroundings and have been observed looking around when they surface for air to see what is around them.
Feeding
There are plenty of food items that this dolphin feeds upon. They include fish, crustaceans, and cephalopods. They have been seen spitting water, but it is still a mystery why they do so. One theory though is that this process helps them to round up schools of fish to feed upon. This is one species of dolphin that has been seen working with humans regarding cooperative fishing endeavors.
The fishermen get the attention of the Irrawaddy Dolphins by tapping on their boats with a wooden key. The dolphins will begin to swim in circles and in the center of those circles are the fish. The turbulence rounds them up and then the fishermen are able to properly set their nets to capture them. The dolphins consume the fish that get out and that are at the edges of the netting.
(source:google/http://www.dolphins-world.com/)
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