Creature Emerging from the Fish Pond

"The Yang Notes" records a legend about a mythical creature known as the "Shahuadu" (shark-deer). It is said that in western Taiwan, residents often share tales of this bizarre creature that can switch between the form of a deer and a shark; when on land, it appears as a deer, but when it enters the water, it transforms into a shark, retaining a One day, a half-fish, half-deer creature with antlers crawled out from a fish pond filled with black water, slowly making its way towards a town that continuously discharges waste. Is it the manifestation of the mythical creature from legend, or a "fish pond monster" conjured up by the local residents