The Dusky Dolphin is very closely related to the Pacific White Sided Dolphin. However, the scientific studies conducted show that there are enough variations for them to be classified as two separate species. What you may not know is that their name was originally going to be Fitzroy’s Dolphin which was given to them by Charles Darwin.
This is a small dolphin species and it is simple enough to identify it from other species out there. This is due to the head that is evenly sloped. It also lacks a beak at the end of the snout. They feature a bluish black color on the tail and along the back. They also have a dark band that is featured from the flanks to the tail diagonally. The belly is white with a dark color for the lower jaw and snout. They have gray from the eye to the flipper and then two white or cream stripes that run between the dorsal fin to the tail.
They are about 6 to 6 ½ feet long. They weigh from 150 to 187 pounds. The males and the females look very similar in size. The male does have a dorsal fin that is more curved than the females.
There are teeth found in both the upper and the lower jaws. They may have from 24 to 36 pairs of teeth that are very small and pointed. Usually, the upper jaw will have 2 sets less than what is found in the lower jaw.
(source:google/http://www.dolphins-world.com/)
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