Members of this order are eel-like aquatic salamanders with much reduced forelimbs and no hind limbs.

The sirens are aquatic salamanders with stumpy forelimbs and no hind limbs.

Many aquatic salamanders and all tadpoles have gills in their larval stage, with some ( such as the axolotl ) retaining gills as aquatic adults.

Adult salamanders often have an aquatic phase in spring and summer, and a land phase in winter.

Amphiuma is a genus of aquatic salamanders, the only extant genus within the family Amphiumidae ().

), fully aquatic salamanders which are not closely related to the axolotl but bear a superficial resemblance.

Sirenidae, the sirens, is a family of aquatic salamanders.

Mudpuppies or waterdogs are aquatic salamanders of the family Proteidae.

* Siren ( genus ), a genus of aquatic salamanders in the Sirenidae family

* Sirenidae, a family of aquatic salamanders

For example, some salamanders forgo metamorphosis and sexually mature as aquatic neotenes.

The salamanders lay their eggs underground, often in threes, which then hatch directly into salamanders, skipping the usual aquatic phase.

Many sources also refer to several species of the genus as cave salamanders, due to their choice of habitat, or as blind salamanders, due to their reduced eyes, or the antiquated term for aquatic salamanders, Triton.

Because oxygen concentration in the water increases at both low temperatures and high flow rates, aquatic amphibians in these situations can rely primarily on cutaneous respiration, as in the Titicaca water frog and the hellbender salamander.

) often ingest aquatic plant material with the invertebrates on which they feed and a Brazilian tree frog Xenohyla truncata includes a large quantity of fruit in its diet.

The western terrestrial garter snake ( Thamnophis elegans ) in California is largely aquatic and depends heavily on two species of frog that are diminishing in numbers, the Yosemite toad ( Bufo canorus ) and the mountain yellow-legged frog ( Rana muscosa ), putting the snake's future at risk.

The use of the term " frog " in common names usually refers to species that are aquatic or semi-aquatic and have smooth, moist skins and the term " toad " generally refers to species that are terrestrial with dry, warty skins.

The African clawed frog ( Xenopus laevis, also known as the African clawed toad or the platanna ) is a species of South African aquatic frog of the genus Xenopus.

When the external form undergoes the greatest change, as from an aquatic insect to a flying gnat, a caterpillar to a crysalis, a crysalis to a butterfly, or a tadpole to a frog, there is nothing new in the organization ; all the parts of the gnat, the butterfly, and the frog, having really existed, though not appearing to the common observer in the forms in which they are first seen.

The American bullfrog ( Rana catesbeiana or by some authorities as Lithobates catesbeianus ) often simply known as the bullfrog in Canada and the United States, is an aquatic frog, a member of the family Ranidae, or “ true frogs ”, native to much of North America.

Gurdon and colleagues also pioneered the use of Xenopus ( genus of highly aquatic frog ) eggs and oocytes to translate microinjected messenger RNA molecules, a technique which has been widely used to identify the proteins encoded and to study their function.

* African clawed frog, species of South African aquatic frog of the genus Xenopus

And it is at this point in the feeding strike that the wood frog differs markedly from more aquatic Rana species, such as the green frog, leopard frog, and bullfrog.

The free living larvae are normally fully aquatic but the tadpoles of some species such as ( Nannophrys ceylonensis ) are semi-terrestrial and live among wet rocks.

The eggs hatch into aquatic larvae, called tadpoles, that have internal gills and tails.

For example, some larvae such as tadpoles live exclusively in aquatic environments, but as adults can live outside water as frogs.

Red-eared sliders are omnivores and eat a variety of animal and plant materials in the wild including, but not limited to, fish, crayfish, carrion, tadpoles, snails, crickets, mealworms, wax worms, aquatic insects and numerous aquatic plant species.

Pied-billed Grebes feed mainly on aquatic invertebrates, and also on small fish and amphibians ( frogs, tadpoles ).

These species feed on small aquatic animals such as mollusks, brine shrimp and other crustaceans, larval insects, segmented worms, tadpoles, and small fish.

They are usually wholly aquatic, though some species have tadpoles that are terrestrial.

The diet consists of adult and larval aquatic insects, molluscs, crustaceans, worms, leeches, frogs, tadpoles and small fish up to 10 – 15 cm long.

These studies furthermore reveal the bullfrog's diet to be unique among North American Rana in the inclusion of large percentages of aquatic animals, e. g., fish, tadpoles, planorbid snails, and dytiscid beetles.

The amphibious species require marshes, ponds, or swamp regions in order to support the aquatic environment the eggs and tadpoles need.

The primary food of these birds includes crustaceans, aquatic insects, fishes, tadpoles and sometimes leeches ( Herpobdelloides sp .).

They feed on aquatic invertebrates such as mayfly larvae and small crayfish, and also on small aquatic vertebrates such as tadpoles and minnows.

Goliath tadpoles are vegetarian and feed on a single aquatic plant, Dicraeia warmingii, found only near waterfalls and rapids, which may help explain their restricted range.

When inundated, riverine wetlands provide habitat for water-tolerant plants such as willows, and aquatic animals such as tadpoles and immature fish.

Its diet consists mainly of small fish, but will also eat tadpoles, frogs, and aquatic insects.

During such events, a variety of aquatic life such as desert fish, shield shrimps ( Triops australiensis ), tadpoles and frogs can flourish.

Adults feed predominantly on mosquitoes, gnats and midges ; the larvae feed primarily on other aquatic insect larvae and on tadpoles.

Nymphs ( naiads ) are aquatic carnivores, feeding on insects, tadpoles and small fish.

Possible reproductive modes include full amphibian spawning with aquatic tadpoles, internal fertilization with or without ovoviviparity, aquatic eggs with direct development or some combination of these.