They are the same really. Toothed whales are a
suborder (called Odontoceti) of the order
Cetacean. All dolphins are included in this
suborder of toothed whales, but not all toothed
whales are dolphins. Toothed whales include sperm
whales, beaked whales, river-dolphins, belugas and
narwhals, dolphins, and porpoises. Some of the
differences between these various families of
toothed whales include different numbers of teeth,
head/nose structure, and body size.
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