Ictiobus cyprinellus It is a species of fish of the family Catostomidae in the order of Cypriniformes. Males can reach 123 cm in total length. It is a freshwater fish with a mild climate. Inhabits North America. And, also, it holds the current record of the longest-lived fish.
And this species is 112 years old, so it was born before the First World War broke out, as suggested by a new study, whose carbon dating has validated that the species is the longest known freshwater fish.
In recent years, thanks to more advanced techniques, scientists have discovered that many species of fish live longer than originally thought: the Greenland shark, for example, can live more than 270 years. Although fish age is a basic aspect of their biology, we often know very little about it.
In the study cited, thin slices of otolith, small calcified structures that help fish to balance while swimming, of 386 Ictiobus cyprinellus caught in the wild, most of which were caught by fishermen. Then, the researchers used a microscope to count the growth rings in each otolith slice. His first counts yielded estimates of fish that live more than 80 and 90 years.
To validate these extraordinary age estimates, they resorted to radiocarbon dating, a well-established method that compares the amount of the carbon-14 isotope in animal tissue with Carbon-14 concentrations released in the mid-1900s during atomic bomb tests.
In total, five specimens exceeded 100 years of age, but a 22-pound female trapped near Pelican Rapids, Minnesota, reached the record of 112 years.