Minorities in cartoons: "Sealab 2020" February 24, 2016 2 min read Adult SwimAfrican-AmericansanimationHanna-BarberaMediaminorities in cartoonsSealab 2020 This week’s minorities in cartoons entry isĀ “Sealab 2020,” a Hanna-Barbera animated series that aired from 1972 to 1973 on NBC. Background The series focused on the 250 residents