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Where is the dolphin's nose?
The hole in the dolphin's head is the nostril ~ ~ similar to a whale.

The nose structure of dolphins is different from ours. Because dolphins live in the ocean, their structures have changed accordingly. The pores of the nose are no longer needed, and there is a movable piece of meat under the dolphins' nostrils to adjust the opening and closing of the nostrils to prevent dolphins from choking in the water.