The ocean's midnight zone, also called the bathypelagic zone, spans from 1,000 to 4,000 meters (3,300 to 13,100 feet) below the surface.
Notes on verification
Confirmed by multiple authoritative oceanographic sources including NOAA, Smithsonian, and WHOI, with consistent depth ranges cited across all. [cascade flags: wikipedia_dropped_other_sources_exist | tier=silver indep_score=1.0 clusters=3 claim_tier=everyday | framework convergence=partial on Standard oceanographic pelagic zone classification system as codified by NOAA and widely adopted in marine science (upstreams: NOAA (National Oceanic and Atmospheric Administration)) — publishers independent, evidence may not be | kind=empirical eligibility=high]
Sources
- Remarkable new swimming sea slug in the deep sea | ScienceDaily (seed:animals_and_wildlife)
- https://oceanservice.noaa.gov/facts/light_travel.html (corroboration)
- https://ocean.si.edu/ecosystems/deep-sea/deep-sea (corroboration)
- https://www.whoi.edu/ocean-learning-hub/ocean-topics/how-the-ocean-works/ocean-zones/midnight-zone/ (corroboration)