Here's why:

* Salinity: This refers to the amount of dissolved salts in a body of water.

* Hypersaline: These environments have salinity levels that are significantly higher than seawater, often exceeding 300 parts per thousand (ppt).

Examples of hypersaline environments include:

* Salt lakes: Like the Dead Sea, Great Salt Lake, and Lake Assal. These lakes are often landlocked and have high evaporation rates, leading to a concentration of salts.

* Salt marshes: These coastal wetlands experience high salt concentrations due to the influence of tides and the proximity to the ocean.

* Coastal lagoons: These shallow bodies of water are often separated from the open ocean by barrier islands and are subject to high evaporation rates.

While the ocean itself has a high salinity (about 35 ppt), hypersaline environments far surpass it in salt concentration. This extreme salinity creates unique challenges for life, leading to specialized adaptations in the organisms that inhabit these environments.