The slippery slope to slime

Overfishing and increasing ocean dead zones are thought to be leading us on a oceans dominated by fleshy algae and jellyfish, a trend coined the "slippery slope to slime" by Jeremy Jackson. This photo is from Fast Company:

fishermen in the Sea of Japan are tormented by invasive swarms of Echizen Kurage (Nomura's jellyfish), a giant jellyfish that weighs up to 450 pounds and measures two meters wide... The students capture Nomura's jellyfish in fixed fishing nets from a lake in Fukui prefecture, an area plagued by the swarms.