Who is the first scientist credited with documenting that sea floor life varies with depth?

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Edward Forbes is the first scientist credited with documenting that sea floor life varies with depth. In 1843, he conducted a study of marine life in the Aegean Sea, and found a distinct zonation of marine organisms based on depth. He concluded that life was limited to a shallow zone of the ocean and that nothing could live at depths greater than 300 fathoms (550 meters).

Who Is the First Scientist Credited with Documenting That Sea