If you ask any fishing enthusiast what they hope to catch in Glen Lake, most will likely tell you they are seeking perch or bass or perhaps even a pike. However, this summer may be prime time to instead aim for bright orange koi fish, as the invasive species presence is confirmed in the lake for the third summer in a row. Koi, an invasive species known for their bright coloring, are a domesticated form of carp native to eastern Asia. They resemble oversized goldfish, and hold distinct and striking color patterns of orange, black, white and yellow. Their beautiful appearance makes them extremely popular as pets and in ornamental ponds worldwide. It is believed that the koi likely started off as pets, and made their way into the lake through being purposefully released. A single female can lay up to 400,000 eggs per breeding cycle, allowing for the population of koi to easily proliferate.