God Clearly Intended for us to stay in the water.

A common belief is that when stressed, an octopus may begin to eat its own arms. However, limited research conducted in this area has revealed that the cause of this abnormal behaviour may be a virus called autophagy that attacks the octopus's nervous system. Thus this behavior may be more correctly labeled as a neurological disorder.

Octopuses are also quite strong for their size. Octopuses kept as pets have been known to open the covers of their aquariums and survive for a time in the air in order to get to a nearby feeder tank and gorge themselves on the fish there. They have also been known to catch and kill some species of sharks.[6]
-http://en.wikipedia.org/wiki/Octopus