Young Manta Rays Stay Near Shore Until Maturity
A regional tracking study found that juvenile giant manta rays remain in shallow coastal waters, while most adults travel long distances along the continental shelf break. Researchers combined acoustic and satellite tracking with photo identification at five Central American sites from 2018 to 2025. The findings suggest that the rays' use of space changes sharply as they grow and eventually face open-ocean risks.
Giant manta rays can reach about nine meters in length and two metric tons in weight, with a wingspan-like disk spanning roughly seven meters. They mature around eight to ten years, so young pups remain vulnerable to sharks and orcas while adults are largely protected by size and deep-diving ability.
The Central American project tracked rays at five sites from 2018 to 2025 using underwater acoustic receivers, satellite tags, and photo identification. More than 12,000 detections showed juveniles about three meters across or smaller staying in nearshore habitats, while nine mature rays moved along the shelf edge; one recognizable individual returned repeatedly.
The findings could help coastal communities, tour operators, fishers, and wildlife managers anticipate where juvenile mantas are likely to concentrate, potentially supporting local tourism and reducing accidental encounters. Because adults may cross national boundaries, the study may also encourage regional data-sharing among researchers and agencies. It does not by itself settle how best to manage fisheries or vessel traffic, but it may inform future monitoring and education efforts.