Indo-Pacific sailfish (Istiophorus platypterus) are found in temperate and tropical ocean waters. These fish are often found near tropical areas, especially near the equatorial regions of the Atlantic, Pacific, and Indian Oceans.ndo-Pacific sailfish (Istiophorus platypterus) are found in temperate and tropical ocean waters. These fish are often found near tropical areas, especially near the equatorial regions of the Atlantic, Pacific, and Indian Oceans.