if fossils of a aquatic animal or plant are found in a place then that place used to be covered by water in the past
aquatic is plant. aquarium is animal_container. fish is aquatic_animal. aquatic_plant is vascular_plant. aquatic_mammal is placental. find_underwater is aquatic_plants. find_underwater is aquatic_life. find_underwater is aquatic_plant. aquatic_ecosystem is water. fish is aquatic_vertebrate.