King mackerel ( Scomberomorus cavalla ), Gulf of Mexico
Source http://www.photolib.noaa.gov/htmls/fish4435.htm
Author NOAA's Fisheries Collection , SEFSC Pascagoula Laboratory; Collection of Brandi Noble, NOAA/NMFS/SEFSC
Source: https://commons.wikimedia.org/wiki/File:Fish4434_-_Flickr_-_NOAA_Photo_Library.jpg

King mackerel (Scomberomorus cavalla) is a migratory species of mackerel family Scombridae found in the subtropical and tropical waters off North America and the Caribbean. The king mackerels are known to make long seasonal migrations in large schools and are often found as solitary individuals or in small groups around outer reefs and depths up to 140 meters.

Order: Scombriformes
Family: Scombridae
Genus: Scomberomorus
Species: Scomberomorus cavalla (Cuvier, 1829)
Synonyms

Cybium cavalla Cuvier, 1829
Cybium caballa Cuvier, 1832
Scomberomorus caballa (Cuvier, 1832)
Cybium acervum Cuvier, 1832
Cybium clupeoideum Cuvier, 1832
Cybium immaculatum Cuvier, 1832