Manta rays (Mobula birostris) will deliver one offspring after a long gestation period of over a year, although, in some cases, twins may be born. A study into how these fish breed is underway to see how conservation measures could be put in place to help the population thrive.

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By: BBC Earth
Title: Pregnancy Scans For Manta Rays | Our Changing Planet | BBC Earth
Sourced From: www.youtube.com/watch?v=WIo4_yudzKk