Native Korean fish discovered in restored Cheonggyecheon Stream, water quality improved in 20 years (Korea)

It has been 20 years since the Cheonggyecheon Stream was reclaimed. To mark this occasion, the National Science Museum under the Ministry of Science and ICT conducted a 2005 freshwater fish market in Cheonggyecheon together with the Seoul Facilities Corporation.
As a result of an academic survey of fish species, a total of 6,700 fish species from 32 families and 1 order were confirmed. Before the restoration, there were only four species living in Cheonggyecheon, but in 20 years, the number has recovered to about eight times that number.
What's interesting is that juveniles of the carp fish, a species endemic to Korea that can only survive in clean, oxygen-rich rivers, have been discovered upstream for the first time.
The survey was conducted three times between April and September at six locations from upstream to downstream.
The site is the same as that of a survey conducted 20 years ago. According to the researchers, the most common fish observed was the minnow, a member of the carp family, followed by the common carp and the Chinese killifish.
Guppies and bass were also found, but they are believed to have been released artificially. The National Science Museum, together with the Seoul Facilities Corporation, held a special exhibition, "Cheonggyeomeolok," at the National Science Museum. Cheonggyecheon
The exhibition looks back on the 20-year journey since the restoration of Cheonggyecheon through data and records. The exhibition also features video content that uses AI (artificial intelligence) to show the process of restoring the Cheonggyecheon ecosystem.