41.699801°N 13.686304°W

Lago di Posta Fibreno is an Italian

Italy

Italy , officially the Italian Republic languages]] under the European Charter for Regional or Minority Languages. In each of these, Italy's official name is as follows:;;;;;;;;), is a unitary parliamentary republic in South-Central Europe. To the north it borders France, Switzerland, Austria and...

 lake

Lake

A lake is a body of relatively still fresh or salt water of considerable size, localized in a basin, that is surrounded by land. Lakes are inland and not part of the ocean and therefore are distinct from lagoons, and are larger and deeper than ponds. Lakes can be contrasted with rivers or streams,...

 located in Posta Fibreno

Posta Fibreno

Posta Fibreno is a comune in the Province of Frosinone in the Italian region Lazio, located about 100 km east of Rome and about 30 km east of Frosinone...

, a municipality of the Province of Frosinone

Province of Frosinone

The Province of Frosinone is a province in the Lazio region of Italy, with 91 comuni . Its capital is the city of Frosinone. It has an area of 3,244 km², and a total population of 489,042 .The Province was established by Royal Decree on 6 December 1926 with territories belonging to Lazio...

, Lazio. At an elevation of 288 m, its surface area is 0.287 km². The lake is in a karst

KARST

Kilometer-square Area Radio Synthesis Telescope is a Chinese telescope project to which FAST is a forerunner. KARST is a set of large spherical reflectors on karst landforms, which are bowlshaped limestone sinkholes named after the Kras region in Slovenia and Northern Italy. It will consist of...

ic terrain and rich in underwater springs.

Overview

The lake of Posta Fibreno is home of an endemic species of trout

Trout

Trout is the name for a number of species of freshwater and saltwater fish belonging to the Salmoninae subfamily of the family Salmonidae. Salmon belong to the same family as trout. Most salmon species spend almost all their lives in salt water...

, the Fibreno trout (Salmo fibreni

Salmo fibreni

Salmo fibreni, or the Fibreno trout, is a freshwater salmonid fish, endemic to Lago di Posta Fibreno in central Italy.The size of Lago di Posta Fibreno is only 0.29 km². It is a narrow lake 1.1 km long, 100–300 m wide, situated 289 m above sea level. The lake is in a karstic terrain and...

), along with the more widespread Mediterranean trout (Salmo cettii

Salmo cettii

Salmo cettii, or the Mediterranean trout, is a species of trout, a freshwater fish in the Salmonidae family. It lives in the Mediterranean region, in Corsica, Sardinia, Sicily and on the Italian mainland in the Magra drainage and further south. It is a non-migratory fish which lives in streams and...

).