H. paradoxus is found in areas with salinity levels range from 10 to 40 parts per thousand.

High salinity levels have been recorded at the mouth of the river.

A drought in 1977, caused salinity levels to exceed public health standards.

During hot, dry weather, salinity levels may reach twice that of seawater in some areas.

Other fish may be present, depending on salinity levels.

They are most well known for their ability to adapt to high salinity levels and flooding.

Only 50% of all water resources have salinity levels lower than 1500 mg/l and can be used without restriction.

The water is replenished several times a year during flooding, and salinity levels are low.

Melting ice, another possibility of global warming, would also decrease salinity levels.

Hudson Bay has a lower average salinity level than ocean water.