Over 100 million sharks are killed every year as by-catch or just for their fins to make soup.
The survival of all marine life depends upon top level predators to keep the system in balance, yet we systematically destroy sharks, dolphins and whales. Over 20,000 dolphins were killed in the Bay of Biscay every year as a by catch, now they are largely gone.
Humanity depends upon healthy marine life, but we are rapidly approaching the end point. We are 100% not going to stop climate change by carbon mitigation alone, unless we start to regenerate nature on land and marine life in the oceans. Humanity is linked to the oceans, if we destroy the oceans then we can not survive.