In her 1970 “Big Yellow Taxi,” Joni Mitchell famously sang “Don’t it always seem to go / That you don’t know what you’ve got / ‘Till it’s gone.” Dr. Daniel Pauly took that one step further in his 1995 paper “Anecdotes and the shifting baseline syndrome of fisheries” by pointing out that not only do we not know what we’ve got, but due to shifting baselines syndrome, when it’s gone we won’t know we ever even had it.