its a amazing information about majestic animal.I think your information fully correct.Manta rays are large rays belonging to the genus Manta. The larger species, M. birostris, reaches 7 m in width while the smaller, M. alfredi, reaches 5.5 m. Wikipedia
Scientific name: Manta
Mass: Giant oceanic manta ray: 1,600 kg Encyclopedia of Life
Higher classification: Eagle ray
Rank: Genus
Did you know: In the Maldives female manta rays show very strong site fidelity, returning to the same feeding and cleaning stations on a regular basis throughout their adult lives, which span many decades.