The fish kill phenomenon in Barangay Pintatagan in Banaybanay, Davao Oriental is allegedly caused by heavy siltation from mining operations in the area, according to local fisherfolk and environmental groups. In a video uploaded on Facebook on November 5 by Mar&Ando Fishcage, a resident from Barangay Pintatagan said fish catch has declined since water conditions in the area have changed because of siltation and discoloration incidents. The siltation reportedly came from mining operations located in high-altitude areas that flow down to the coastal waters of local fishing communities during rainfall, thus affecting the water conditions.

Mendoza, I. F. (2022, November 10). 'Fish kill' in Davor?. SunStar Davao, p. 2.