abyssal

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abyssal

A romantic term equal to an ocean depth of -200 to -700 metres

abyssal

(of organisms) inhabiting deep water below 1000 m.
References in periodicals archive ?
The benthic fauna is better-known because organisms are "concentrated" on the seafloor and capturing them is relatively more efficient; it occurs in the bathyal zone (between 656 and 13,123 ft [200 and 4,000 m] depth, immediately below the sublittoral zone occupying the entire continental platform), the abyssal zone (between 13,123 and 19,685 ft [4,000 and 6,000 m]) and the hadal zone (between 19,685 and 36,089 ft [6,000 and 11,000 m]).