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
Though the terms 'dolphin' and 'porpoise' are sometimes used interchangeably, porpoises are not considered dolphins and have different physical features such as a shorter beak and spade-shaped teeth; they also differ in their behavior.