There is a confusion in denomination of animals and particularly of fishes. This fact hampers their recognition, study and solving a number of ecological, biocenological and other problems. Incorrect translation of the names of salmon fishes - Stream Trout, Lake Trout, Rembow Trout - are shown in the article and made more exact. The names of 4 races of Sevan trout Ïshkhan" are made exact. Taking into account Lake Sevan, the inadmissibility of naming any other salmon Ïshkhan" is well - grounded.