A temporary ban on all salmon fishing has been implemented in Chukotka, Russia due to declining salmon populations.

Now believed to be caused by an unprecedented algae bloom, the decimation of bottom-dwelling sea life may have devastating ripple effects.

The Amur River, once full of salmon, has seen the fish all but vanish since 2017. The problem started because of over fishing. At first companies were harvesting in the first 100 kilometers of the river, and since they have expanded 700, 800 kilometers upstream.