What niche are rainbow trout in?

Rainbow trout (_Oncorhynchus mykiss_) are a species of freshwater fish belonging to the family Salmonidae. They are native to the Pacific coast of North America and have been introduced to waters in many other parts of the world, including Europe, Asia, and South America. Rainbow trout are typically found in cold, clear streams and rivers, where they feed on insects, small fish, and crustaceans. They are a popular target of recreational anglers due to their aggressive feeding habits and beautiful coloration. Rainbow trout are also commercially important, and are raised in aquaculture operations around the world.

In their native range, rainbow trout occupy a variety of habitats, from small streams to large rivers and lakes. They are most abundant in clear, cool waters with a pH between 6.5 and 8.0. Rainbow trout are also tolerant of a wide range of temperatures, and can survive in water as cold as 32°F (0°C) and as warm as 90°F (32°C).

Rainbow trout are opportunistic feeders, and will consume a variety of insects, small fish, crustaceans, and other aquatic organisms. They are also known to eat zooplankton, phytoplankton, and even small mammals and birds. Rainbow trout typically feed during the day, but may also feed at night in deep water.

Rainbow trout are a relatively fast-growing fish, and can reach a maximum size of about 40 inches (100 cm) and weigh up to 20 pounds (9 kg). They typically live for about 6-8 years in the wild, although some have been known to live for up to 15 years.

Rainbow trout are an important part of the food web in their native range, and provide a valuable food source for a variety of predators, including birds, fish, and mammals. They are also a popular sport fish, and are prized for their beauty, fight, and taste.