This article researches whether there is a link between Euler’s numbers and genetic codes. At first, the sum of the numbers of the first fifteen "15" digits of Euler’s numbers after the comma are converted to bases in genetic codes. Secondly, after the comma, Euler’s numbers with eighteen fifteen groups are converted to nucleotide bases. So, the results obtained by this way are expressed as nucleotide bases (A, T, C, G, U). (A)Adenine, (T)Thymine, (C)Cytosine, (G),Guanine, (U)Uracil. Thirdly, the search result is similar to ZEBRAFISH-DANIO RERIO, and even bat coronavirus after the NCBI (National Biotechnology Information Center) searched this sequence ”AUGUUGAUAUTAAUCATC”. Fourtly, the genetic codes of Zebrafish have been proven to be very similar to human genetic codes. Fifthly, multiple spawning of these fish species also means that Euler's numbers are increasing. In sum, the relationship between the Euler’s numbers in mathematical science and the atomic weights of atomic elements in genetic codes also shed lights on Biochemistry.