Abdrahmanov Yusif Alakbar oglu was born on May 18, 1912 in Sheki. He graduated from Sheki Pedagogical College (1928), Azerbaijan State University Biology faculty (1939).
In 1945 he defended his dissertation in philosophy, and in 1960 - Doctor of Sciences.
Y.Abdulrahmanov was appointed the head of the Ichtiology Laboratory, established in 1952 on the basis of the Department of Aquatic Animals of the Institute of Zoology.
During his tenure as head of the ichthyology laboratory, he established a scientific school for the study of inland waters of the Republic, the Azerbaijani sector of the Caspian Sea and the freshwater fish fauna of Azerbaijan and their reserves. Y.Abdulrahmanov's studied the morphology, distribution, habitat and economic significance of 95 species and semi-fish in the fresh waters of the Caspian Sea and the Azerbaijani sector of the Caspian Sea.
Y.Abdulrahmanov published more than 100 scientific works, including 6 monographs ("Our Fishes" (1955), "Dictionary of Zoological Terms" (1961), "Freshwater Fishes of Azerbaijan" (in Russian, 1962)) He was the author and co-author of the series "Fishes" (1966; Volume VII).
Y.Abdulrahmanov was Member of Scientific Council of United Dissertation Defense, Institute of Zoology and Azerbaijan State University, Department of Biological Sciences of the Academy of Sciences of the Soviet Socialist Republic of Azerbaijan He is a member of the Council, the Coordination Council on the Use of Biological Resources of the Waters, the Expert Committee of the USSR Ministry of Fisheries, the Central Council of the Society of Hydrobiologists of the USSR, the Council of Biology and Agriculture of the Soviet Encyclopedia of Azerbaijan.
For many years of flawless work Y.Abdulrahmanov was awarded the Order of Honor and 4 medals.
The Presidium of the Central Council of the Azerbaijan Society for the Conservation of Nature awarded Y.Abdulrahmanov the first degree diploma in 1971. He has repeatedly received letters of appreciation from the Republican Knowledge Society for his active participation in the dissemination of scientific knowledge among the masses.
Under his guidance 3 doctors of sciences, 15 doctors of philosophy were defended.
Corresponding member of ANAS Yusif Abdulrahmanov died November 3, 1977 in Baku.