An experiment at Northwestern University in Chicago used oysters that normally opened up their shells at high tide each day.

Approach channels to the port currently have a draft of 11.6m at all tides, and 12.1m at high tide .

As explained earlier, this section is fully tidal and as such alters in depth from low tide to high tide by an average of about 17 ft.

At high tide , many mudskipper species take cover in their submerged burrows to avoid being attacked by predatory fish that cruise the shallows.

At high tide , the little bay looks deep and blue and can even develop some modest whitecaps.