Tropical rock lobsters, or pearl lobsters, as they're better known, are one of the rarest and most expensive lobster varieties. The colorful crustaceans are so valuable that there have been international smuggling attempts of its larvae. Commercially bred pearl lobsters sell for about $50 per kilogram, while wild-caught pearl lobsters sell for $99 per kilogram. This makes pearl lobsters more than six times as expensive as Maine lobsters. So, what makes pearl lobsters so special? And why are they so expensive?