Among "hotspots" of the trade is Taguig City, while Iligan City, Cebu, Pampanga and Tarlac are areas with the most recorded cases.
The victims, he said, were made to believe by their own parents or guardians that their sexual acts shown online were harmless as there is no physical contact.
Special Agent Michael Van Aelstyn of the FBI Violent Crimes Against Children Unit said online sexual exploitation in the Philippines mostly happen in cybersex dens.
Read more: Cybersex ops still prevalent in PH; 80 pct of victims are minors