👉 "Porpoises" is a term used in the literature and science of marine mammals, specifically referring to the species "Cetacea" (the family Porpoiseidae). These are large, herbivorous mammals that live primarily on sea creatures such as fish, shellfish, and crustaceans. They have long, slender bodies with thick fur or scales covering their skin, which helps them to glide in water. Porpoises are highly intelligent and social animals, living in groups