Originally posted by Apple:

they wont attack you unless you basically beach your boat.
you can still sail around the shallows

I don't know what this guys is talking about but Deathsqutos have a very large aggro range. I would NOT advise this approach if you are not ready yet.

The second I see an indicator that it is plains trees, grass color or the distinct rocks I then keep it at a distance to where I see the land but I also am not too close.. Definitely would not get close enough to have any of the mobs render.