As the seat of Miami-Dade County, the municipality is the principal, central, and most populous of its metropolitan area and part of the second-most populous metropolis in the southeastern United States.
porpoise (plural porpoises) A small cetacean of the family Phocoenidae, related to whales and dolphins. (Canada, US, imprecisely) Any small dolphin. Synonyms . garfish, mereswine, sea hog, sea pig, seaswine; Translations
No. Porpoises are quite distinct from dolphins. Like all whales, dolphins, and porpoises, they're both cetaceans. But whereas scientists group dolphins into the family Delphinidae , porpoises belong to the family Phocoenidae (fo-seen-ee-dee). Porpoises are smaller and squattier than dolphins, and have no rostrum.