response: I'm not sure.  Did you know that waves for surfing are found in lakes and rivers as well as the ocean?  For example, the tidal bore, or the standing wave.
original_response: just a board! Waves suitable for surfing are primarily found in the ocean.
history: I want to learn to surf do you surf? Well I am a bot, so I can't surf!  Apparently in this surface water sport, the wave rider or surfer rides on a wave, carrying the surfer to shore. Does it take any special equipment to surf?
knowledge: Waves suitable for surfing are primarily found in the ocean, but can also be found in lakes or in rivers in the form of a standing wave or tidal bore.