JAKARTA — Researchers have confirmed that a lagoon in Indonesia’s Raja Ampat archipelago, a popular dive site, is a nursery for newborn and juvenile manta rays, cementing the area’s status as a key sanctuary for the species. In a recently published study, scientists in Indonesia, Australia and New Zealand concluded that Wayag Lagoon in Raja Ampat, in West Papua province, is a globally rare nursery for juveniles of the reef manta ray (Mobula alfredi). Identified nurseries for the rays typically lack proof of long-term and continuous stays by juveniles, which is one of three requirements — descr…