Yagyag is the vernacular for spawning, to lay eggs or spread, propagate and grow. The process refers in particular to the crabs and other marine creatures, which gather during the months of October to December in Sapa, one of the springs, found in Barangay Cangmating of Sibulan.
The creatures lay and float their eggs during high tide, to mature in the swamps. In the coming months, people from the neighboring barrios from Agan-an to Maningcao would come in groups for nature’s marine bounty, which are harvested for food and as materials for crafts. This is also an occasion for trading and barter, and celebration.
The festival is showcase of local arts and culture, fashion, and unity. It features Madri gras-type street dancing and related events. Held last Sunday of April.