Massive overfishing
The global fishing fleet is 2-3 times larger than what the oceans can sustainably support.
In other words, people are taking far more fish out of the ocean than can be replaced by those remaining.
As a result:
53% of the world’s fisheries are fully exploited, and 32% are overexploited, depleted, or recovering from depletion1
Most of the top ten marine fisheries, accounting for about 30% of all capture fisheries production, are fully exploited or overexploited1
Several important commercial fish populations have declined to the point where their survival is threatened
Unless the current situation improves, stocks of all species currently fished for food are predicted to collapse by 20482