Guest
The penultimate episode deals with marine life that is structured around the rising and falling tides. These are caused by the gravitational pull of the orbiting moon, but in some locations, this can also combine with the power of the sun to create a tidal bore. The world’s largest tides are to be found in the Bay of Fundy in Nova Scotia and therefore it is a rich feeding ground. A school of finback whales is closely shadowed by a flock of Cory’s shearwaters. However, they only have a limited time to feed before low tide, when they must retreat and other creatures appear. Elsewhere, some of the latter include sand bubbler crabs, bears (which feed on shellfish) and a snail species that can ’surf’, and some sand lances being preyed on by dogfish sharks. The extreme spring tides allow opportunists to forage further, and raccoons are shown tackling a red rock crab.
