At first glance, it really looks like an oil spill messing around and it’s spreading really fast!
Then students Julia Fiedler, Sean Crosby and Bonnie Ludka decided to see what it is underwater and they are all amazed by what they saw.
It was a group of fish or the righ term must be “Anchovy school”, freely swimming around or might be migrating to or from somewhere else.
Here is the video that will explain it all. This video is uploaded by Scripps
Oceanography via YouTube.
Anchovy school at Scripps Pier, July 8, 2014
An aggregation of anchovy amassed near Scripps Pier at Scripps Institution of Oceanography, UC San Diego in La Jolla, Calif. on July 8, 2014. Footage from Scripps Pier by Scripps staff and underwater by Scripps graduate students Julia Fiedler, Sean Crosby and Bonnie Ludka.