 Genetic studies conducted on Clymene dolphins ( Stenella clymene ) focused on their natural histories , and the results show that the origin of the species was actually an outcome of hybrid speciation . Hybridization between spinner dolphins ( Stenella longirostris ) and striped dolphins ( Stenella coeruleoalba ) in the North Atlantic was caused by constant habitat sharing of the two species . Relationships between these three species had been speculated according to notable resemblances between anatomies of the Clymene and the spinner dolphins , resulting in the former being regarded as subspecies of the latter until 1981 , and the possibility of the Clymene dolphin as a hybrid between the spinner and the striped dolphins have come to question based on anatomical and behavioral similarities between these two species . 
