Scary Sea Monster Really Just Hundreds of Tiny Fish in a Trench Coat

posted by Jason Kottke   Jan 24, 2020

As a defense against predators, these juvenile striped eel catfish from Jemeluk Bay near Bali organize themselves into an ambling, pulsating sea creature that looks like something out of a Miyazaki film. The Kid Should See This:

Try rewatching the video, picking one fish and following it the entire time. Then pick another fish and watch the video again. The juvenile striped eel catfish seem to cycle through positions within the school as the entire swarm moves forward.

Like riders in a peleton, each taking their turn braving danger at the front.

See also A Talented Pufferfish Creates an Underwater "Crop Circle".