Mysterious ocean vegetable root thing, laying on the sand

Weird ocean vegetable root thing sitting on a piece of wood, sitting on the sand

Anyone know what these mysterious ocean veggies are? Found a bunch of them on the beach washed up. #ocean #plantidendification #whatisthis #oceanplants #vegetables #gardening #farming #mysterious #potato? #oceanpineapple #rootplant #plants #nature #beach #beachfinds #oceanlife #PNW #guesstheplant