A large voracious fish (Pomatomus saitatrix), of the family Carangidæ, valued as a food fish, and widely distributed on the American coast. On the New Jersey and Rhode Island coast it is called the horse mackerel, in Virginia saltwater tailor, or skipjack.

A West Indian fish (Platyglossus radiatus), of the family Labridæ.

bluish warm-water marine food and game fish that follow schools of small fishes into shallow waters

Bluefish is a programmer's Web development editor written using GTK, designed to save the experienced webmaster some keystrokes. It features a multiple file editor, multiple toolbars, custom menus, image and thumbnail dialogs, open from the Web, CSS dialogs, PHP, HTML, Java, C, and XML support, external program integration , and lots of wizards.

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Bluefish is a free software/open source text editor for POSIX-conforming operating systems such as Linux and Mac OS X. Its use is suitable for many programming and markup languages, with particular focus on their use for web development.