What is the fastest fish in the ocean?

The fastest fish in the ocean is the black marlin (Istiompax indica), which can reach speeds of up to 82 miles per hour (132 kilometers per hour). Found in the Indian and Pacific Oceans, black marlins are known for their incredible speed and agility. Their streamlined bodies and powerful tails help them chase down prey such as tuna and squid. The speed of the black marlin makes it one of the most formidable predators in the ocean.