While there appear to be very wide waters in the tidal flats biome, they do not have any borders that I can see and therefore they fall under this category?:
If the waterway has no border on it, it's basically a stream or a pond, which means it's probably too shallow or narrow for more than a rowboat.
I understand that they are probably very shallow and couldn't handle a boat of any size, but they are SO wide on the map that I just wanted to confirm they can't even handle a barge. Thanks.
Scorus