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 festival is showcase of local arts and culture, fashion, and unity. It features Mardigras-type street dancing and related events. Held every last Sunday of April.