The Russian Ekranoplan was also know as the "The Caspian Sea Monster"

Ekranoplan

I think you are thinking of the Russian Ekranoplan, which uses a 'Wing in ground effect' to travel very fast, low over water.

Ekranoplan

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Yes, that was big, but the record for the heaviest object ever to fly is still the Saturn V that took Apollo 11 to the Moon. Twice as high as Niagara Falls and weighed six million pounds.

The fastest sea vessel was not even a ship: it was a plane/boat hybrid called an ekranoplan that used the "ground effect" to keep the vessel above the water as it "flew" at an altitude of a few meters above the water. In effect, it was a seabound flying boat. The Russian-built vessel called the Caspian Sea Monster was a prototype that reached a test speed of 404 mph. Smaller versions have served with the Soviet Navy.

The fastest actual ships are hovercraft designs such as the Mountbatten class ferries, and their military counterparts that can travel up to 95 mph. The "official" speed record is somewhat lower, at about 86 mph.