Definition that contains bottoms
- black birch birch of swamps and river bottoms throughout the eastern United States having reddish-brown bark
- swamp cypress common cypress of southeastern United States having trunk expanded at base; found in coastal swamps and flooding river bottoms
- lepas fascicularis stalked barnacle that attaches to ship bottoms or floating timbers
- jawfish small large-mouthed tropical marine fishes common along sandy bottoms; males brood egg balls in their mouths; popular aquarium fishes
- sand dollar flattened disklike sea urchins that live on sandy bottoms
- feather star free-swimming stalkless crinoid with ten feathery arms; found on muddy sea bottoms
- taxodium distichum common cypress of southeastern United States having trunk expanded at base; found in coastal swamps and flooding river bottoms
- limnodium spongia American plant with roundish heart-shaped or kidney-shaped leaves; usually rooted in muddy bottoms of ponds and ditches
- red birch birch of swamps and river bottoms throughout the eastern United States having reddish-brown bark
- american frogbit American plant with roundish heart-shaped or kidney-shaped leaves; usually rooted in muddy bottoms of ponds and ditches