The penguin poop didn’t only influence krill movements. In another phase of the experiment, researchers noticed the zooplankton consumed 64 percent less algae after sensing what they thought may be nearby birds. This implies that krill engage in evasive maneuvers so much that they subsequently eat less when guano is in the water around them.

A new study shows that the mere presence of poop prompted the crustaceans to launch into evasive maneuvers. New research suggests that the presence of penguin poop causes krill to lose their appetite,