An examination of 40-year-old preserved salmon has led scientists to an unexpected and encouraging discovery about the state of our oceans. Researchers observed a notable increase in the levels of tiny parasitic worms within certain salmon species from these vintage cans. Surprisingly, this rise is interpreted as a positive indicator of more robust and complete marine food webs.
Given that these parasites rely on a complex life cycle involving multiple hosts, including various marine mammals, their proliferation could signify ecosystem recovery unfolding over several decades. Thus, what might initially seem unappetizing actually serves as a compelling sign of improving ocean health.