Webfeb 5, 2024 · newly sequenced genomes of blue whales in the atlantic ocean contain unexpectedly high levels of fin whale dna, hinting that the two species have been interbreeding much more than previously. Some hybrid animals occur naturally in the wild, but others are forcibly bred by backyard breeders and held in captivity. Webhybrid animals are the result of two different species mating and producing a mixed offspring.