EntityQ618477· pop 31· linked from 68 articlesaphotic zoneSign in to saveportion of a lake or ocean where less than 1% of sunlight penetratesConnectionsbathyal zoneEntityGreekEntityoceanEntitylakeEntityInternational Standard Book NumberEntitydigital object identifierEntityInternational Standard Serial NumberEntityMariana TrenchEntityTeuthidaEntitysperm whaleEntityQ180686EntitysunlightEntitybioluminescenceEntitybibcodeEntityLophiiformesEntityphytoplanktonEntitypelagic zoneEntitycopepodEntityQ229883EntityseabedEntityCategoriesAquatic ecologyOceanography