the morphology of the fish as it is understood by the human is not dependent on the orientation of the fish to its external environment http://en.wikipedia.org

the morphology of the fish as it is understood by the human is not dependent on the orientation of the fish to its external environment http://en.wikipedia.org/wiki/Posterior_%28anatomy%29#Anterior_and_posterior http://en.wikipedia.org/wiki/Posterior_%28anatomy%29#Anterio... that is, "back" would usually mean the location of the spine. Regarding how the fish perceives or thinks about its orientation I think this is impossible to say!