"The last fallen mahogany would lie perceptibly on the landscape, and the last black rhino would be obvious in its loneliness, but a marine species may disappear beneath the waves unobserved and the sea would seem to roll on the same as always."
Ray, G.C., 1988. Ecological diversity in coastal zones and oceans. In: Derraik, J.G.B, 2002. The pollution of the marine environment by plastic debris: a review. Marine Pollution Bulletin 44, pp. 848