The German man named Spelunker have discovered the first ever cave fish in Europe. Spelunker Joachim Kreiselmaier has discovered fish in August 2015 while he was exploring Danube-Aach cave system in southern Germany.
The cave fish species were present in every continent except Antartica and Europe and now the German man have found cave fish in Europe continent.
The cave fish was discovered about 472 miles away from the north. These species was found near rivers, they have small eyes, large nostrils and did not have any hue.
It is thought that the species have entered the cave system after the melting of glaciers.
Features of the cave fish
These fish species have unique characteristics that differentiate them from others. The species of these fish had fins that resemble wings. Due to such fins, they can stick easily to the rocks inside the caves. Spelunker was investigating the deepest regions of Danube-Aach, which can be explored only in summer and fall season when the atmosphere is dry. He has then clicked the photographs of these fish and shown them to Roland Berka who is the geologist.
He decided to take some photos of the creature and showed them to hobby geologist Roland Berka. The characteristics of the fish that revealed the cave adaptations were confirmed by Jörg Freyhof, from the Leibniz Institute for Freshwater Ecology and Inland Fisheries (IGB) in Berlin.
After the discovery of these cave fish species by Spelunker in 2015, the researchers were able to study its features in a better way.
Unique fish species
These cave fish are genetically different, which have increased in number since last 20,000 years and then went underground. The results of the study indicate that these species are quickly adapting to the subterranean habitats.
The satellite-based analysis shows that these cave fish are isolated from other fish population and shows a varying genetic composition. Hence they follow a unique evolutionary process but they are not separated from the surface population.