• Silver Rainbow ( almost free of speckles, found generally in lakes).
• Steelhead ( marine variety, migratory; the term is also applied to other species bred from this).
• Mc Cloud River Rainbow
• Steelhead Trout (migratory)
• Kamploops Trout (migratory)
• Silver Trout (migratory)
• Hatchery Rainbow (fish farming)

• Two dorsal fins; the second is fleshy and lacks fin rays (adipose fin)
• Ventral fins in the abdominal area
• Caudal fin – straight or almost straight edge.
• l Ray less fins lacking spines.
• Large mouth, jaw bones longer that the ocular orifice.
• No barbel.
• Body covered with small scales.
• Sexual dimorphism: head of adult males is longer than the female head, prominent jaw (“hooked”), and in general have a more definite coloring.
• Color: dark back, ranging from green to brown, mottled in black as in the flanks and dorsal, caudal and anal fins. A pink or red longitudinal line on each flank, running from the eye to the caudal fin, strongly marked in mature fish and specially in the males during the breeding season. The body is speckled and it varies a lot; there are specimens profusely mottled and others almost plain (silver); a similar change of hues can be found in the reddish line along the spine.

 This species are much valued for sporting purposes; it is very strong and fights well; it attacks every type of lure, often not to feed but for the sake of the chase. It is found in almost every suitable environment in the Neuquén region (streams, river, lakes and lagoons). The species is widely used for fish farming in most parts of the world as it adapts well to being handled and to conditions of high population density; it responds well to artificial feeding and unlike other salmon species, it can also endure higher temperatures and under oxygenated water. The variety known as steelhead  is  anadromous, which means that it spawns in fresh water and then migrates to the sea; the fish commonly known as steelhead but living exclusively in a fresh water environment have some predecessor related to that migratory variety. There are also other migratory varieties of this species known by different common names, mostly in English. Individuals affected by parasites can be observed in natural habitats; their form is  mostly vermiform, with bodies disproportionately thin and usually of a darker coloring.
The rainbow trout found in lakes usually has a uniform color, almost free of specks and almost non existing reddish longitudinal lines (except during the breeding season); these individuals are commonly known as “silver trout”.

The rainbow trout can produce hybrid individuals such a the brown trout, general produced by manipulated procedures done in fish farms. The resulting fish, which are infertile, are known as “brow bow”  and their bodies are profusely mottled, with smallish, irregular shaped flecks which also cover the dorsal and caudal fins; these flecks are larger and not as dark as those found in the rainbow trout.

• Brown
• European trout
• Coffee trout (Chile)
• Brown trout
• European Brown trout
• Loch Leven trout
• Sea-run Brown trout (migratory)

• Two dorsal fins; the second is fleshy and lacks fin rays (adipose fin)
• Ventral fins in the abdominal area
• Caudal fin – straight or slightly concave edge.
• Ray less fins lacking spines.
• Large mouth, jaw bones longer that the ocular orifice.
• No barbel.
• Body covered with small scales.
• Sexual dimorphism: head of adult males is longer than the female head, prominent jaw (“hooked”), and usually have a more definite coloring.
• Color: it varies according to the location and natural habitat; generally the dorsal area is dark, brown to green and it is lighter in the flanks, which may seem somewhat like silver; yellow belly, sometimes silvery. The body has black specks surrounded by a clear ring, spotted with small red dots. The caudal fin may be mottled but usually these are rather scarce and found in the upper lobe. In many specimens, specially those found in lakes, the coloring is often lighter and the specks on the body and fins may be missing or be very scant.

This species are much valued for sporting purposes; it is very strong and fights well; it attacks every type of lure, often not to feed but for the sake of the chase. These trout are not as abundant as the rainbow trout although it is found in many brooks, lakes and rivers of the Neuquén region. In general terms it is not fitted to adapt to high temperatures as well as the rainbow trout does, but it responds well when handled in fish farming for spawning and breeding purposes. In certain sub species like the Fario variety (Salmo Trutta Fario) found in rivers and streams, the “lacustral” variety found in the lakes and another termed as “marmoreal”. There is also a migratory variety that lives in the sea and returns to fresh waters to breed; it originally comes from Iceland and the North of Europe and has been introduced in several countries in the world. It was introduced in Argentina, in Tierra del Fuego; these trout quickly reach maturity in the sea and their color is lighter and silvery; in Europe they can grow to a large size (approximately an average of 15 kilograms, with exceptional individuals weighing over 35 kilograms).

• Fontinalis.
• Salmon trout
• Brook trout
• Eastern Brook trou

• Two dorsal fins; the second is fleshy and lacks fin rays (adipose fin)
• Ventral fins in the abdominal area
• Caudal fin – almost straight edge.
• Ray less fins lacking spines.
• Large mouth, jaw bones longer that the ocular orifice.
• No barbel.
• Body covered with very small scales.
• Sexual dimorphism: head of adult males is longer than the female head, prominent jaw, and in general have a more definite coloring.
• Color: generally dark back, green or brown and occasionally black with undulating lighter streaks reaching the dorsal fins and part of the caudal fin. The flanks have small red flecks with a lighter halo in hues of blue; it also has some yellow-green specks. The pectoral, ventral and anal fins are reddish orange in a white border outlined by a black ring. The belly is orange red, mostly in the males during the breeding season

This species are much valued for sporting purposes; this fish is very strong and fights well; it will attack every type of lure, often not to feed but for the sake of the chase itself. In spite of its common name (Brook Trout), and the fact that in is natural habitat it lives mostly in waters with powerful streams, in Neuquén it is commonly found in the lakes and some rivers. It favors cold, well oxygenated waters,. When mated with the Brown Trout or the American lake trout (Salvelinus namaycush), the Brook Trout produces hybrid specimens; in general this fertilization is man induced. With the Brown Trout, it produces specimens known as “tiger trout”, so called because of their peculiar type of coloring, remarkable dark and light stripes covering the whole body, including the dorsal fin; the pectoral, ventral and anal fins have a white ring on the edge.
When the American lake trout female eggs are fertilized by the sperm of brook trout, the resulting hybrid specimen is known as a “splake”; these specimens are fertile and able to reproduce naturally. They have been hatched in some water compounds in Canada. Their bodies are generally dark, profusely dotted with light specks and their back has a vermicular aspect; the ventral, pectoral and anal fins are dark and have a noticeable white band on the edge.

• Landlocked Atlantic Salmon
• Traful salmon
• Curruhe salmon
• Sebago Lake salmon

• Two dorsal fins; the second is fleshy and lacks fin rays (adipose fin)
• Ventral fins in the abdominal area
• Caudal fin – concave edge, a deeper cleavage in young individuals.
• Ray less fins lacking spines.
• Large mouth, although the jaw bones is no longer than the ocular orifice.
• No barbel.
• Body covered with small scales.
• Sexual dimorphism: head of adult males is longer than the female head, prominent jaw (“hooked”), and in general have a more definite coloring.
• Color: dark back, bluish with silver flanks, often with blue or green highlights. The body is covered with dark specks which may be very scarce. Few and distinct ocular specks.

This is the most coveted specimen of the Neuquén waters; it will attack every type of lure, not always for feeding purposes, and it is a great fighter.
Among the salmonidae to be found in the province, the species are not only the less abundant but also their distribution is well confined; it is mostly found in the river and lake Traful and the Currhue Grande lake and its tributaries. It is also found in other environments, such as the Epulafquen and Huechulafquen lakes , the upper Limay river, etc. This species is less tolerant to certain environmental conditions such as the ones endured by the rainbow trout, for example; it needs a larger surface in which to move. The typical sub species is the Atlantic salmon (Salmo salar salar), which is anadromous, meaning that the adult specimens leave the sea to find fresh water streams for their reproduction, and unlike the Pacific salmon (Oncorhynchus spp). that perish after  hatching, they can find their way back to the sea and thus reproduce again (the rate of registered deaths is however, substantial).  The Atlantic salmon lives in the Atlantic ocean and spawns in the water streams of Europe (from Spain to the White Sea) and North America (from New England to the Labrador peninsula);  it is also found in Iceland, Greenland and Great Britain.
In Canada there is another variety of locked salmon: Salmo salar ouananiche, which is smaller and more mottled than the Sebago lake salmon and it prefers to live in  rivers rather than  lakes.