Editing Pelagic zone (section)

===Abyssopelagic (abyssal zone)===
{{Main|Abyssal zone}}
{{Hatnote|From around {{cvt|4000|m|ft}} down to above the [[ocean floor]]}}

The name is derived {{ety|grc|[[wikt:ἄβυσσος|ἄβυσσος]]|bottomless}} – a holdover from times when the deep ocean was believed to be bottomless. Among the very few creatures living in the cold temperatures, high pressures and complete darkness here are several species of squid; [[echinoderm]]s including the [[basket star]], swimming cucumber, and the [[Scotoplanes|sea pig]]; and marine arthropods including the [[sea spider]]. Many species at these depths are transparent and eyeless.<ref name="marinebio.com"/>