A state lawmaker is introducing legislation that would ban Seaworld from using Orcas in its San Diego shows. Assemblyman Richard Bloom, D-Santa Monica, said he was driven to author the bill by allegations of animal abuse made in the disputed documentary ``Blackfish.'' He says there is no justification for the continued captive display of Orcas for entertainment purposes. Bloom also says the beautiful creatures are much too large and far too intelligent to be confined in small, concrete tanks for their entire lives. Seaworld executives have adamantly denied animal abuse allegations, along with accusations that they do not do enough to protect the trainers who work with killer whales, which can live up to 80 years, grow to 32 feet in length and weigh up to six tons.