Introduction

What are porpoises?

• Common names "porpoise" and "dolphin" have been used interchangeably

• According to scientific classification, porpoise and dolphin belong to the order Cetacea

• Cetacean is a group of mammals that are completely aquatic and show common features, such as streamlined shape, a lack of external hind limbs, a propulsive tail fluke and blowholes

Chinese White Dolphin

Finless Porpoise