Pseudocotyle squatinae"、单殖亚纲的"Leptocotyle minor"及等足目的"Aega rosacea"。扁鲨是埋伏的掠食者，主要吃底栖的硬骨鱼、鳐科及无嵴椎动物。它们也会猎食欧洲无须鳕、绯小鲷、石鲈属、鲆属、斑尾棘鲆、鳎、欧洲乌贼、欧洲横纹乌贼及耳乌贼属、甲壳类的"Dorippe lanata"、"Geryon tridens"、"Dromia personata"、菱形长脚蟹、"Macropipus corregatus"及"Atelecyclus rotundatus