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Everything depended on tides—the twice-daily rise and fall that exposed and concealed the intertidal zone.
The Low Tide:
When the tide retreated, the shore transformed—previously submerged areas became accessible, marine creatures were exposed, the harvest window opened. But this window was temporary (perhaps 2-4 hours of optimal foraging depending on tidal range) and required precise timing.
The coastal forager watched the moon, tracked the tidal patterns, knew when low tide would occur, and planned expeditions accordingly. Missing the window meant missing food—the tide’s return made foraging impossible, sweeping away opportunities until the next low tide.
The Spring and Neap Tides:
The moon’s phases affected tidal range. Spring tides (during full and new moons) had extreme high and low points—exposing normally submerged areas, revealing the richest foraging grounds. Neap tides (during quarter moons) had minimal range—less area exposed, fewer opportunities.
The experienced forager scheduled major expeditions during spring tides, maximizing access to productive areas.
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