It was my third visit to the laboratory of Fish Physiology and Genomics, INRA, Rennes, France. I worked in the really nice research group "Cell Cryoconservation and Fish Regeneration"under the supervision of Dr Catherine Labbé, and Alexandra Depincé. During my stay I was involved into the experiment on somatic cells nuclear transfer in model species, goldfish (Carassius auratus). Mostly I was focused on the genotyping of clones and observation of chimeras produced during experiment. Also I was briefly familiarized with the basic knowledge of methylation technique. I would like to thank Developmental Project for the financial support.