Pontic shad Pontic shad The Pontic shad ("Alosa immaculata", previously "Alosa pontica"), also referred to as the Black Sea shad or Kerch shad, is a species of clupeid fish in the genus "Alosa", native to the Black Sea and Sea of Azov basins. "Alosa immaculata" lives in the Black Sea and Sea of Azov, and adults migrate up rivers to spawn. It may also be found in the Marmara Sea in Turkey. It currently migrates up and spawns in six rivers: the Danube, Dnieper, Dniester, Southern Bug, Don and Kuban Rivers. Previously the migrations reached far upstream, up to 1,600 in Danube
Sander (genus) and is used as an outgroup to root the tree. Sander (genus) Sander (formerly known as "Stizostedion") is a genus of fish in the Percidae (perch) family. They are also known as "pike-perch" because of their resemblance to fish in the unrelated Esocidae (pike) family. Local names for the fish have been the basis for many geographical names, like River Suda in Russia or Saunags village on the Baltic coast. The genus includes the following 5 species: Phylogenetic relationships of the species of genus "Sander" based on the concatenated data set of six gene regions and a Bayesian analysis. "Romanichthys