Bottlenose dolphins from the Southern California Bight have been found to have the highest pollutant levels yet measured among marine mammals--a true concern among marine biologists.

Brief Description:

• Typical full-grown length: up to 4 meters (13 feet)

• Color: dark gray on back; lighter gray on sides; belly is white to pink

• Dorsal(back): dorsal fin is tall and its back is curved

• Beak: thick and short

• Other distinguishing characteristics: rides bow waves, often turning its head downwards or to the sides while doing so

• Habitat: temperate and tropical, usually within 20 miles of shore (often in bays, lagoons, and large rivers) and around islands, but extending seaward of the continental shelf.