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Rainbow trout12/30/2023 There’s one very important exception though – rainbow trout cannot live in polluted water! There’s one particular type of water that rainbow trout will never live in.Īs we’ve established, rainbow trout are so adaptable that they can live in almost all types of water. In 2014 they were listed in the top 100 invasive species in the world. Rainbow trout are highly in demand, and as such they’re found in fish farms around the world.Īs is always inevitable with such large-scale demand, these fish unfortunately found their ways into the surrounding streams, rivers and waterways.ĭue to their predatory nature and ability to live in almost any condition, they quickly started hunting native species to the point of endangerment. The largest producer of rainbow trout is surprisingly not the US though, it’s Chile!Ĭommercial rainbow trout farming is no small-scale industry either, with 666,592 tons of the fish harvested globally in 2007. The practice of farming rainbow trout for commercial practices has been going on since the late 19 th Century, beginning in the US. They’re certainly not picky when it comes to mealtime! Rainbow trout have been farmed for food since 1870. This ranges from fish smaller than them to fish eggs, crayfish, and shrimp. Other than insects, rainbow trout are known to hunt other water-based life. They are also known to eat land-based insects that are unlucky enough to fall into water nearby. The main part of their diet is made up of various aquatic insects, feeding on the larval, pupal, and adult forms. Rainbow trout have been known to eat nearly anything they can lay their jaws on. The eggs then usually take around four to seven weeks to hatch. The female rainbow trout then lays an absolutely insane amount of eggs – up to 3,000 eggs per kilogram that the female weighs! There they dig a small recess, called a redd, in the gravel bed. When it comes time to spawn their eggs, female trout will find a bed of fine gravel in a calm, but shallow area. One of the most interesting facts about rainbow trout is that they will always return to the area they were born when it comes time to spawn their eggs.įor most species of rainbow trout this is a relatively simple process, as they tend not to stray far away from home.įor other subspecies, like the steelhead trout, this is a serious endeavor! Rainbow trout can lay thousands of eggs at a time. Rainbow trout always end up returning to their birthplace. Interestingly, they will always return to freshwater to spawn their eggs. Steelhead trout are born in freshwater, and then will live most of their lives in the ocean. Well, their scales take on a more steel-like sheen due to their life in the ocean. So why are they called steelhead trout, and not rainbow trout? These ocean-loving cousins are referred to as steelhead trout, instead of rainbow trout. Technically, they’re actually a sub-species of the rainbow trout. Some rainbow trout prefer to live in the ocean. They’re not only good for eating, but can be a great challenge to fish for sport. The answer is quite simple: they’re incredibly easy to raise in fish farms, and are very adaptable to many different environments. So why are they found all over the world now? So what is it that makes this fishy little guy so popular? Let’s take a closer look! Rainbow trout can be found in over 45 countries.Īs previously mentioned, the rainbow trout is only native to a very specific region of the world. While they are found on coastal regions, they are actually almost always freshwater fish, living in cold water tributaries which eventually lead into the Pacific Ocean.Īll that said, rainbow trout can now be found all over the world, and are bred specifically for both food and sport. The rainbow trout is native to a very small region of the world, which includes the west coast of North America and the Kamchatka peninsula of Russia. Like all trouts, the rainbow trout is part of the same family as salmon, which is called salmonidae. The rainbow trout ( Oncorhynchus mykiss) was first properly identified and named by Europeans in 1792 thanks to the German naturalist Johan Julius Walbaum.
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