Many fish species that fluoresce are small, group-living, or benthic/aphotic, and have conspicuous patterning. The benthic zones are aphotic and correspond to the three deepest zones of the deep-sea. Aphotic is the eighth studio album by the heavy metal band Novembers Doom. The profundal zone is often part of the aphotic zone. At a depth of there is perpetual darkness in the midnight (aphotic) zone. The caves are deep and totally aphotic. Below this zone the deep sea begins, consisting of the aphotic "bathypelagic", "abyssopelagic" and "hadopelagic". Their eighth album, "Aphotic", was released in spring 2011.