Category: Fish

Bodensee-Kilch (Coregonus gutturosus) und ein Tiefseesaibling (Salvelinus profundus)
Historic depiction of the Lake Constance whitefish with the Lake Constance deepwater char (bottom left), which was rediscovered in 2016. Both lived in the deep areas of Lake Constance — a habitat that was severely affected by eutrophication in the 20th century. (© Walter, Emil, Public domain, via Wikimedia Commons)
Fish

Lake Constance Whitefish: An example of species loss in alpine lakes

Species or just a form? The Lake Constance whitefish or kilch belongs to the genus Coregonus—a group of salmonids found in cool, oxygen-rich waters across the Northern Hemisphere. In Europe, they are known as Felchen, Maränen, Reinanken or Renken (whitefish). Hardly any other fish group is considered as taxonomically difficult: many forms have arisen only

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Haplochromis vonlinnei holotyp Buntbarsch Victoriasee
The brownish-gray cichlid Haplochromis vonlinnei reached a length of nearly 16 centimeters. Its snout was relatively pointed and its teeth strongly curved. It is assumed that the species was a specialized piscivore, as remains of smaller cichlid species were found in the intestines of collected specimens. Image: Eelco Kruidenier, CC BY 3.0, via Wikimedia Commons
Fish

Haplochromis vonlinnei (Cichlid)

One of 500 furu Haplochromis vonlinnei is a probably extinct cichlid species from Lake Victoria in East Africa. The original scientific description of the species was published in 2008 by Dutch ichthyologist Martien J. P. Van Oijen based on five specimens caught between 1978 and 1980 in the southern part

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Schwertstör Psephurus gladius
Drawing of a Chinese paddlefish from 1868. The frontal portion made up around one-third of the fish's total length. Chinese paddlefish reached lengths of more than three meters and weights of up to 300 kilograms. (© Muséum d'histoire Naturelle, Public domain, via Wikimedia Commons)
Fish

Chinese Paddlefish

An ancient swimming fossil in the Yangtze River The Chinese paddlefish and its relatives were already swimming through Earth’s waters more than 100 million years ago. This freshwater predator, said to have reached lengths of seven meters and weights of several thousand pounds, survived the mass extinction 66 million years

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Acanthobrama telavivensis
There are hardly any images of Acanthobrama hulensis. The photo shows the fish Acanthobrama telavivensis from Israel, which belongs to the same genus. (© MERRYcristhmas, CC BY-SA 4.0, via Wikimedia Commons)
Fish

Hula bream

Drainage of lake and wetland led to extinction of fauna The wetlands surrounding the 20 square kilometer Hula Lake (also known as Hula Lake, Chula Lake) in Israel were artificially drained in the 1950s to create agricultural land. Within a few years, the endemic fauna of the lake—including the Hula

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