Although some large mammals (such as elephants) have particularly large cerebra, dolphins are the only species (other than humans) to have cerebra accounting for as much as 2 percent of their body weight.
Aínda que algúns grandes mamíferos (como os elefantes) teñen cerebros especialmente grandes, os golfiños son as únicas especies á parte dos humanos que teñen cerebros que supoñen o 2% do seu peso corporal.