It is one of the most-watched videos of all time, clocking up almost four billion views on YouTube since it surfaced three years ago.
With its catchy lyrics and effortless dance moves, the Baby Shark song has taken the internet by storm and become the (intrinsically repetitive) soundtrack to many parents' weekends.
Now it has been revealed that the Korean family behind the lucrative track is sitting on a multimillion-dollar fortune.
Kim Min-seok, 38, co-founded entertainment company SmartStudy Co. in 2010 and its educational offshoot, Pinkfong, released the video Baby Shark in 2016.
His father runs Samsung Publishing Co., and the family's stakes in these two companies puts their combined wealth at around $193 million, according to Bloomberg.