Marine life is severely threatened by climate change, according to a new report from the Marine Conservation Biology Institute and the World Wildlife Fund. Among other problems, warming oceans seem to be causing declines in sea critters low on the food chain, which harms fish, whales, and other animals high on the food chain. The report found that species harmed by rising temperatures include sockeye salmon in the North Pacific, which are losing weight, and the polar bear population on Canada’s Hudson Bay, which is shrinking each year.