Brown Trout: Brownie, Loch Leven Trout or Sea Trout

Brown Trout: Brownie, Loch Leven Trout or Sea Trout

Brown Trout is a stout bodied fish with a large mouth. A single soft rayed dorsal fin and a dorsal adipose fin.

Scientific Name: Salmo Trutta

Brown Trout Alternate Common Names;

Brownie, Loch Leven Trout or Sea Trout.

Family Classification: Salmonidae

Brown Trout is an originally European species of salmonid fish. It includes both freshwater populations, referred to Salmo Trutta Morpha Fario and S. Trutta Morpha Lacustris, and Anadromous known as the sea trout, S. Trutta Morpha Trutta.

Brown trout mature at about 3 or 4 years of age. They spawn in the fall from October into December. When they spawn, they head into shallow headwater brooks of the river. The female scoops out a hollow on a gravel reds where she can lay her eggs. As she releases the eggs on the reds, the male simultaneously releases milt to fertilise them.

Identification Characteristics:

The Brown Trout is a stout bodied fish with a large mouth. A single soft rayed dorsal fin and a dorsal adipose fin.

They grow up to a length 100 cm around 20 kg. Although in many smaller rivers, a mature weight of 1 kg or less is common.

They have a thick body with a large head, and a large mouth extending backwards to below the eye. A very distinct lateral line with 110-120 scales. The tail fin is slightly forked.

Colour varies considerably, due to the age of fish, habitat and food. They usually silvery or olive with dark spots on the sides of the body and upper fins and gill covers. The spots are often surrounded by a lighter halo. In addition to those on the lower sides are pale or red to orange.


Brown trout can only produce in rivers where habitat conditions are suitable. Due to extensive local and overseas research has identified these habitats are preferred by trout. Also, they provide the best spawning success, survival and fast growth rates.

The ideal conditions are cool, well-oxygenated waters, usually in gravel-bottomed streams with a moderate to swift flow. But also in cool, clear lakes and impoundments fast flowing water with water.

In depths of 20-100 cm deep and between 30 to 100 centimetres per second. Will produce quantities of macro invertebrates for e.g. mud-eyes, mayfly, stonefly, snails and shrimp provide food for fish growth. Optimum water temperature range between 4 to 19°C. Water temperature during the spawning season from May to June should be around 2 to 12°C.

Adult brown trout prefer to rest against the bank, protected from overhead view. And in water more than 45 cm deep but with water velocities between 5 and 30 centimetres per second. They prefer to move, feed and forage in water more than 45 cm deep. Although they can pass through barriers and riffles with shallower water. Extensive areas of water over 70 cm deep will facilitate good growth rates resulting in numbers of large-sized fish.

Juvenile trout seek cover and protection from larger predatory fish. Therefore, by living in riffles with a coarse substrate and water depths of 15-45 cm. The juvenile brown trout avoid the higher water velocities. Which often occur in the riffles, by sheltering within the coarse substrate.


Cicada, Crickets, Freshwater Yabbies, Garden Worms, Grasshoppers, Live Minnow, Maggots, Mudeye and Mussel.


Minnow Deep Diving, Minnow Neutral Buoyant, Spinner Blade or Spoon.


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