Question

What causes the abundance of available food in the Bay of Fundy?

Answer 1

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Well basically from what i know

The currents in the Bay of Fundy cause upwelling of nutrients from the ocean floor, resulting in a biologically active photic zone (the area near the top of the water where light can penetrate) with an abundance of both phytoplankton and zooplankton - the most critical links in the marine food chain.

Answer 2

@harloo please vote me as best