Species like thresher, bull and hammerhead sharks have lost up to 80-99% of their populations in the last two decades.

Seabird populations have declined by 70% since the 1950's.

Studies estimate that up to 40% of all marine life caught is thrown overboard as bycatch.

Six out of seven species of sea turtles are either threatened or endangered due to fishing.

Over 300,000 whales, dolphins and porpoises are killed as bycatch every year.

2.7 trillion fish are caught every year, or up to 5 million caught every minute.

Fish populations are in decline to near extinction.

https://www.seaspiracy.org/facts

Fish biomass bottomed at the end of the 90s, which resulted in a bunch of changes in how large-scale fishing happens around the world: https://www.pnas.org/doi/10.1073/pnas.1909726116

This mostly fixed the problem but demand keeps on increasing along with changes to water temperature, so local collapses in specific populations are becoming a big problem again.

There is a very long list of collapsed fish stocks. The industry is only saved by fishing down the food chain and exploiting new species, which are often harder to catch, helped by techonology.

I think many newfoundlanders that had to abandon their old fishing towns forever would be quite surprised to hear that the doomsayers were wrong.