Istiophoridae:

Histiophorus gladius (Syn. Istiophorus platypterus) on top = Indo-Pacific sailfish (Istiophorus platypterus)

Tetrapturus albidus on bottom = Atlantic white marlin (Kajikia albidus)

Source: http://www.photolib.noaa.gov/historic/nmfs/figb0377.htm

Source: https://commons.wikimedia.org/wiki/File:Istiophoridae.jpg

The Indo-Pacific sailfish (Istiophorus platypterus) is a sailfish native to the Indian and Pacific Oceans. Two sailfish species have been recognized; Atlantic sailfish and Indo-Pacific sailfish. However, no differences have been found in mtDNA, morphometrics or meristics between the two supposed species and most authorities now only recognized a single species, (Istiophorus platypterus), found in warmer oceans around the world.

White marlin (Kajikia albidus), also known as Atlantic white marlin, marlin, skilligalee, is a species of billfish that lives in the epipelagic zone of the tropical and subtropical Atlantic Ocean.