levrelles

Levrelles are a type of small, freshwater fish native to the rivers and streams of the Pacific Northwest region of North America, particularly in the states of Washington and Oregon. They belong to the salmonid family, closely related to trout and char, and are scientifically known as *Oncorhynchus clarkii lewisi*, a subspecies of the rainbow trout (*Oncorhynchus mykiss*). The name "levrelles" is derived from the French word for "little trout," reflecting their smaller size compared to other salmonids in the region.

Levrelles typically reach lengths of 10 to 15 centimeters (4 to 6 inches) and weigh between 20 to 50 grams (0.7 to 1.8 ounces). They possess a distinctive pink or reddish stripe along their sides, which is more pronounced in males during spawning season. Their diet consists mainly of small aquatic insects, crustaceans, and zooplankton, making them an important part of the freshwater food web.

These fish are anadromous, meaning they spend most of their lives in freshwater but migrate to the ocean to mature before returning to their natal streams to spawn. However, unlike their larger relatives, levrelles rarely venture far from their natal rivers, often remaining in the same tributaries throughout their lives. Their spawning runs typically occur in late fall or early winter, with females laying eggs in gravel nests prepared by males.

Levrelles are not commonly targeted by anglers due to their small size, but they play a significant ecological role in maintaining the health of their aquatic ecosystems. Conservation efforts focus on protecting their habitats from pollution, habitat degradation, and barriers like dams that disrupt their migration patterns. They are also studied as indicators of environmental health in freshwater systems.