The Paratethys ocean, Paratethys sea or just Paratethys was a large shallow sea that stretched from the region north of the Alps over Central Europe to the Aral Sea in Central Asia.
 The sea was formed during the Oxfordian stage of the Late Jurassic as an extension of the rift that formed the Central Atlantic Ocean and was isolated during the Oligocene epoch (about 34 million years ago).
 It was separated from the Tethys Ocean to the south by the formation of the Alps, Carpathians, Dinarides, Taurus and Elburz mountains.
 During its long existence the Paratethys was at times reconnected with the Tethys or its successors, the Mediterranean Sea or Indian Ocean.
 From the Pliocene epoch onward (after 5 million years ago), the Paratethys became progressively shallower.
 Today's Black Sea, Caspian Sea, Aral Sea, Lake Urmia, Namak Lake and others are remnants of the Paratethys Sea.
The Qom River receives its water from the Zagros Mountain and the Namak Lake; It is a large river in Iran.
 The Qom flows through the city of Qom, and together with the Qareh Su it gains a length of approximately 400 km .
 The water level strongly fluctuates between 312 m³/s and only 4 m³/s.
 This is partially the effect of taking water for irrigation.
Namak Lake (Persian: دریاچه نمک‎ , "Daryāče-ye Namak " ‎ , i.e., "salt lake") is a salt lake in Iran.
 It is located approximately 100 km east of the City of Qom and 60 km of Kashan at an elevation of 790 m above sea level.
Capoeta buhsei is a species of cyprinid fish from the Lake Namak basin, Iran.
 It is usually less than 10 cm long.
The Mayo Kébbi is a river in Central and West Africa.
 The river rises in Chad, then flows west into the Bénoué River.
 Mayo-Kébbi Prefecture in Chad is named for it.
 The Mayo Kébbi is the major outlet for Lake Fianga, shared between Cameroon and Chad.
Lake Fianga is a lake in Chad and Cameroon.
 It does not have clearly delineated borders, as it forms the western border of an area of permanent swampland.
 The lake forms with the seasonal flooding of the Logone River.

Question: Lake Fianga and Namak Lake, are a lake?
Answer: yes