Ballerus ballerus
Encyclopedia
Cyprinus ballerus also known as zope or blue bream, is a fish
native to Eurasia
. Cyprinus ballerus feeds mostly on larger zooplankton
. In Sweden
it is seen in lake Vänern, Hjälmaren
, Mälaren
and adjoining waters, plus Helgeån waterbody. It can reach sizes for up to about 45 cm, and 0.8 kg.
Fish
Fish are a paraphyletic group of organisms that consist of all gill-bearing aquatic vertebrate animals that lack limbs with digits. Included in this definition are the living hagfish, lampreys, and cartilaginous and bony fish, as well as various extinct related groups...
native to Eurasia
Eurasia
Eurasia is a continent or supercontinent comprising the traditional continents of Europe and Asia ; covering about 52,990,000 km2 or about 10.6% of the Earth's surface located primarily in the eastern and northern hemispheres...
. Cyprinus ballerus feeds mostly on larger zooplankton
Zooplankton
Zooplankton are heterotrophic plankton. Plankton are organisms drifting in oceans, seas, and bodies of fresh water. The word "zooplankton" is derived from the Greek zoon , meaning "animal", and , meaning "wanderer" or "drifter"...
. In Sweden
Sweden
Sweden , officially the Kingdom of Sweden , is a Nordic country on the Scandinavian Peninsula in Northern Europe. Sweden borders with Norway and Finland and is connected to Denmark by a bridge-tunnel across the Öresund....
it is seen in lake Vänern, Hjälmaren
Hjälmaren
Lake Hjälmaren is Sweden's fourth largest lake. It is situated adjacent to Lake Mälaren through which it drains into the Baltic Sea, west of Stockholm...
, Mälaren
Mälaren
Lake Mälaren is the third-largest lake in Sweden, after Lakes Vänern and Vättern. Its area is 1,140 km² and its greatest depth is 64 m. Mälaren spans 120 kilometers from east to west...
and adjoining waters, plus Helgeån waterbody. It can reach sizes for up to about 45 cm, and 0.8 kg.