No one else thinks the Hiroshima Carp relates to HEROES, a NBC drama television series.
Hiro Nakamura, a fictional character on the drama, is nicknamed "Carp".
Cause Hiro looks like carp when he speaks.
According to the online comic on NBC.com, Hiro is named after Hiroshima. (From wikipedia"Hiro Nakamura")
So I guess Hiro's nickname "Carp" derived from the Hiroshima Carp.