The baby will remain ungendered and unnamed for the next two months.
"Fostering the biological couple's egg to Sphen and Magic was the best outcome for all penguin couples and the future of their eggs", the aquarium said.
Aquarium staff announced on Friday morning that Sphen and Magic had officially become parents.
Baby Sphengic has already stolen everyone's heart on the Internet!
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Written by Justin Richardson and Peter Parnell, "And Tango Makes Three" is a children's book based on the true story of Roy and Silo, two male penguins at New York's Central Park Zoo who reared their own chick.
Two weeks ago the aquarium's "fabulous love birds" captured the world's attention when they became celebrities on Twitter.
In the meantime, his name will be Sphengic, an affectionate name given to the chick by well-wishers online by combining his parents'.
The 91g chick was born at 5:45 p.m. on October 19.
The chick is the attraction's first sub-Antarctic penguin since the colony first joined the aquarium in November 2016, and will now act as an ambassador for its generation.
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In the wild, however, these courtships are unlikely to result in a chick, so they are normally shortlived, with the penguins becoming unsatisfied and looking for another partner.
Staff say the two are "absolute naturals". They built a nest of pebbles for an egg, and workers, playing along, gave them a dummy egg to place in the nest.
The aquarium has now reported that "the loving foster parents are co-parenting exceptionally well to raise their young". During the chick's first five to six weeks, the baby boy is fed up to ten times a day, and once he's big enough he'll begin taking swimming lessons.
"We can't wait for the world to fall in love with Baby Sphengic like they did with our incredible same-sex couple, Sphen and Magic!"
During incubation periods, one member of a gentoo pair will incubate the egg while the other patrols the nest's perimeters, "warding off any potential pebble thieves or over-inquisitive neighbors", the aquarium says.
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