(CNN) Meet Hong Hong. He's almost 4 months old, lives in China and has 31 fingers and toes.
That's not a typo. The boy was born in January with 15 fingers and 16 toes in Pingjiang County in Hunan province. He also has two palms on each hand and no thumbs.
Doctors diagnosed Hong Hong with polydactylism, a congenital condition that happens in humans, dogs and cats, giving them extra fingers and toes. Polydactyly is a pretty common condition, affecting about one in every 1,000 live births, according to Children's Healthcare of Atlanta. Often, the extra digits are removed surgically. Hong Hong's parents are trying to raise enough money so their son can undergo the life-changing operation.
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The condition is usually passed down in families, which is the case for Hong Hong.