A scuba diver swims through an underwater field of tape grass leading away from the Blue Springs cave in Merritts Mill Pond in Marianna, Florida.

A Peninsula Cooter turtle (Pseudemys peninsularis) looking up and positioned on the sandy bottom of the Morrison Springs cavern at 80 feet deep in the fresh clearwaters of the State Park near Red Bay, Florida.

Langtang Khola River meandering through the Valley, Langtang Valley trek, Himalayas, Nepal, Asia

A large petroglyph covered boulder in dry Stillman Lake at the bottom of the Verde River Canyon in Paulden, Arizona, United States of America, North America

France, To Uraine Val-De-Loire, In Dre-Et-Loire, The River Loire At Brehemont, Gabarre Traditional Loire Boat With Flat Bottom At Quay

Free diver strokes Florida manatee (Trichechus manatus latirostrus), Crystal River, Florida, United States of America, North America

The summer Milky Way with the Summer Triangle stars through pine trees, shot from the Howse Pass Viewpoint at Saskatchewan River Crossing, Banff National Park, Alberta. Jupiter is the bright object at the bottom.

West Indian manatee (Trichechus manatus), overgrown with moss, resting on the bottom, Grass perch, Green sunfish (Lepomis cyanellus) eats moss from manti, cleanerfish, Three Sisters Springs, Manti Sanctuary, Crystal River, Florida, USA, North America

Side view of a glass bottom boat, Hamilton, Bermuda

Submerged alligator (Alligator mississippiensis) is only visible with his armored back poking above placid waters as he hunts on the muddy bottom of the Okefenokee Swamp. The reptiles skin has embedded bony plates called osteoderms or scutes. Alligator populations are considered to have recovered from overharvesting pressures through supplemental farming practices and protections placed on wild animals. However, the species is still federally listed as threatened because it looks like the American crocodile, which is endangered, Georgia, United States of America

Colorado River In The Bottom Of The Grand Canyon, Arizona, United States Of America

Water Abstract 23, Massachusetts, Seekonk, Caratunk Wildlife Refuge, Ripples and reflections on water surface.

A split image of four endangered Florida Manatee (Trichechus manatus latirostris) resting on the sandy bottom at Three Sisters Spring. The Florida Manatee is a subspecies of the West Indian Manatee, Crystal River, Florida, United States of America

Endangered Florida Manatee mother and calf (Trichechus manatus latirostris) gather at Three Sisters Spring. The Florida Manatee is a subspecies of the West Indian Manatee, Crystal River, Florida, United States of America

Water Abstract 18, Massachusetts, Seekonk, Caratunk Wildlife Refuge, Ripples and reflections on water surface.

Iratiko Erreka river, at the bottom of the Foz De Lumbier canyon, nature reserve in the province of Navarra, Spain