1. Size: Small dolphins are typically between 1.2 to 2.5 meters (4 to 8 feet) in length.
2. Weight: They can weigh anywhere from 40 to 150 kilograms (88 to 330 pounds).
3. Body Shape: Small dolphins usually have a streamlined body, adapted for fast and efficient swimming.
4. Coloration: The color of small dolphins varies depending on the species. Some species have uniform coloration, while others may have distinct patterns or markings. Common colors include shades of gray, brown, or black, often with lighter undersides.
5. Dorsal Fin: Small dolphins typically have a triangular or falcate (curved like a sickle) dorsal fin located on their backs.
6. Flippers: They possess flippers that aid in steering, balance, and maneuvering in the water.
7. Snout: Small dolphins have a snout or beak-like structure, which varies in shape and size depending on the species.
8. Blowhole: Like all dolphins, they have a blowhole located at the top of their heads for respiration and communication.
9. Teeth: Small dolphins have numerous sharp, conical teeth used for catching and holding prey. The number and arrangement of teeth vary among different species.
10. Flukes: At the tail end, they have a pair of horizontal tail flukes that provide propulsion and stability while swimming.
11. Rostrum: Some small dolphin species may have a prominent rostrum or beak extension.
12. Melon: Many small dolphins also possess a melon, a specialized organ in the head that helps with echolocation and producing sounds.
These are some general physical characteristics of small dolphins, but specific dolphin species may have variations and additional distinguishing features.