"Leedsichthys" could have been a ram feeder, making the water pass through its gills by swimming, but could also have actively pumped the water through the gill basket.In 2010, Liston suggested that fossilised furrows discovered in ancient sea floors in Switzerland and attributed to the activity of plesiosaurs, had in fact been made by "Leedsichthys" spouting water through its mouth to disturb and eat the benthos, the animals dwelling in the sea floor mud.