A nocturnal, semi-aquatic rodent.

Beavers

A nocturnal, semi-aquatic rodent.

A species of bug that have aquatic habits.

Water Bug

A species of bug that have aquatic habits.

The common name of butomus umbellatus is Flowering Rush. Flowering Rush is an aquatic plant. The flowers are rose colored and bloom in the summer.

Habit and Single Flower of Butomus Umbellatus

The common name of butomus umbellatus is Flowering Rush. Flowering Rush is an aquatic plant. The flowers…

A type of Ganoid fish. This particular species is a Reed fish.

Calamoichthys Calabaricus

A type of Ganoid fish. This particular species is a Reed fish.

1. Ichthyosaurus, 2. Teleosaurus, 3, 4, and 5. Plesiosaurus

Aquatic dinosaurs

1. Ichthyosaurus, 2. Teleosaurus, 3, 4, and 5. Plesiosaurus

The Great Crested Grebe (Lophæthyia cristata) is a fresh-water, migratory, diving bird of the family Podicipidæ. It has a duck-like body, brownish and white plumage, long neck, short wings, no tail, and large, flattened toes furnished with lobate membranes serving the purpose of webs. Most of its life is spent in fresh water  lakes and ponds, but in winter and during migration, it often resorts to the sea. It is an excellent diver. The nest is made of rushes and other aquatic plants and usually floats on the water, being loosely anchored to weeds and grass. It is found in nearly all parts of Europe and Asia.

Great Crested Grebe

The Great Crested Grebe (Lophæthyia cristata) is a fresh-water, migratory, diving bird of the family…

Hesperornis is an extinct genus of flightless aquatic birds that lived during the Santonian to Campanian sub-epochs of the Late Cretaceous (89-65 mya). Hesperornis were very large birds, reaching up to 2 meters (6.5 feet) in length. They had virtually no wings, swimming with powerful hind legs. Their toes were probably lobed rather than being webbed, as in today's grebes; like in these, the toes could rotate well, which is necessary to decrease drag in lobed feet but not in webbed ones such as in loons, where the toes are simply folded together.

Hesperornis

Hesperornis is an extinct genus of flightless aquatic birds that lived during the Santonian to Campanian…

"Longitudinal section of a Hydra; <em>b</em>, bud which will form a young one; <em>ba</em>, base by which it is attached when not creeping." &mdash; Davison, 1906

Section of a hydra

"Longitudinal section of a Hydra; b, bud which will form a young one; ba, base by…

The imbricated turtle at sea.

Imbricated turtle

The imbricated turtle at sea.

A raft which is inflatable used in emergencies, as when a ship must be abandoned or when a plane is downed at sea.

Aquatic Lifesaver

A raft which is inflatable used in emergencies, as when a ship must be abandoned or when a plane is…

Manatees are large, fully aquatic marine mammals sometimes known as sea cows. The name manat&iacute; comes from the Ta&iacute;no, a pre-Columbian people of the Caribbean, meaning "breast".

Manatee on Shore

Manatees are large, fully aquatic marine mammals sometimes known as sea cows. The name manatí…

"In the newt a tail is superadded to the extremities, the tail and the extremities both acting in swimming."&mdash;Pettigrew, 1874

Crested Newt

"In the newt a tail is superadded to the extremities, the tail and the extremities both acting in swimming."—Pettigrew,…

"The Little Penguin, adapted exclusively for swimming and diving. In this quaint bird the wing forms a perfect screw, and is employed as such in swimming and diving."&mdash;Pettigrew, 1874

Little Penguin

"The Little Penguin, adapted exclusively for swimming and diving. In this quaint bird the wing forms…

A type of Ganoid fish.This particular species is a Shovel-beak.

Scaphirhynchus Platyrhynchus

A type of Ganoid fish.This particular species is a Shovel-beak.