When you decide to embark on any journey, small or big, you are taking a chance on the unknown. The ocean is a big body of water, we can assume that it is full of fish, big or small. But, we can’t know for sure what is in there, not in its entirety.

Can't see the bottom on the sea
can't feel the edge of the sand
won't be taken by love of the hand
or fate of the damned.