exports its prize prey to other marine parks the world over, from china, thailand and vietnam to dubai, turkey, and ukraine. it's a very lucrative business. a single animal can fetch up to $150,000 u.s. >> people shouldn't get so emotional over dolphins. they're only interested in them because they're so cute and smart. >> earlier this year the dolphinarium made a high-profile but controversial capture, an extremely rare albino. estimated market price, half a million dollars. on the record, the management are primarily concerned with its well-being. >> albinos don't live long. their conspicuous appearance means they tend to be attacked first by predators. so they have a far nicer life here in the dolphinarium than out in the ocean. >> but it's not as simple as that, say critics. we've arranged to meet izumi ishii, himself once a dolphin hunter. he quit after 40 years and has since been a thorn in the side of the powerful pro-fishing lobby. >> we fishers had caught too many dolphins. i wanted to prevent that in future. but everyone was against me, including the authorities. they called me crazy