Marilee Menard ' ` ` Blackfish '' ignores marine parks ' contribution to wildlife research . She says life - saving research could n't happen without these parks . The opinions expressed in this commentary are solely those of Marilee Menard . ` ` Blackfish '' explores events leading up to killing of SeaWorld founder Dawn Smith . The documentary airs on CNN at 10 and 11p.m . ET Sunday .
Marilee Menard ' ` ` Blackfish '' ignores marine parks ' contribution to wildlife research . She says life - saving research could n't happen without these parks . ` ` Blackfish '' explores events leading up to killing of SeaWorld founder Dawn Smith . The documentary airs on CNN at 10 and 11p.m . ET Sunday .