Schreckstoff Tracks

Schreckstoff is a substance found in the skins of fishes which when released into the water due to injury, serve as an alarm substance to warn other fishes of danger. I observed a video in which researchers recorded the movement of a fish which had detected schreckstoff in its waters and was exhibiting unusual fish activity that we interpret as fear in the fish. The fish’s path has been outlined as a form of mark-making.