| Diversity in the abyssal zone is also relatively flat compared to the bathyal zone. |
| Under water: Scuba diving or snorkelling will allow us to visit the abyssal zone of Scandola Nature Reserve. |
| Abyssal waters retain several cubic centimetres of dissolved oxygen per litre, because the sparse animal populations do not consume oxygen faster than it is introduced into the abyssal zone. |
| They are found in all seas, at all latitudes, and from the intertidal to the abyssal zone. |
| There are at least 12,914 marine species in South Africa, but small bodied species are poorly documented and the abyssal zone is almost completely unexplored. |
| It lies in the hadal zone beyond the abyssal zone, and plunges down to a water depth of around 11 kilometers. |
