Size:  6.0-12.5 ft (~2-4 m)

Weight:  300-1400 lbs (135-635 kg)

Symmetry:  Bilateral symmetry

Color:  Light gray to black

Body covering:  Slick leathery and dense skin.  Most sensitive around blow hole.

Eyes:  Dolphins have acute vision both in and out of the water. A dolphin's eye is particularly adapted for seeing under water.

Nostril:  All research suggest that dolphins have no sense of smell.

Ears:   Hear tones with a frequency up to 160 kHz with the greatest sensitivity ranging from 40 to 100 kHz.  Small external ear openings don't seem to be important in conducting sound