A demonstration of the power of a whale shark’s gulp, creating a vortex, sucking in all the surrounding fish and plankton and in this case breaking the surface like bathwater running down a plughole. (Credit: BBC America)

A demonstration of the power of a whale shark’s gulp, creating a vortex, sucking in all the surrounding fish and plankton and in this case breaking the surface like bathwater running down a plughole. (Credit: BBC America)