It’s anyone’s guess what surf instructor Ryland Rubens was sharing the water with while out surfing in San Diego. Instagram commenters have theories ranging from kelp formation to underwater pterodactyl to UFO. Have look, what the heck is that thing?

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Francis Xavier is a seasoned writer for Unofficial Networks, bringing a lifetime of outdoor experience to his work. Having lived in a ski resort town for years he has a deep connection to mountain culture....