"The ground surface that lies beneath a sea."^^ . _:b1217176 . _:b1217176 . "ENVO"^^ . . . "ENVO:00000482"^^ . "SeaFloor"^^ . _:b1217176 . "EcoLexicon:sea_floor"^^ . "sea floor"^^ . "Wikipedia:Sea_floor"^^ . "sea bed"^^ . "sea bottom"^^ . _:b1217176 .