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as there are other parasitic fish species with similar feeding habits. Check out: Dog Gets Excited For Naps and Why. The candiru’s notoriety is largely attributed to the myth that it can swim upstream ...
It was the first documented case in North America of invasive northern pike, considered an exclusively freshwater fish, swimming in an estuary, an area where freshwater and saltwater meet. “I think ...
The site is in the Kenai National Wildlife Refuge, and biologists worried that invasive pike that got there after swimming across Cook Inlet would spread farther into the freshwater system. (Photo by ...