Manta Ray Intelligence
Mobula birostris
Quick Fact
Manta rays have the largest brain-to-body ratio of any fish species and have been observed apparently recognising their own reflection.
About This Species
Manta rays (Mobula birostris and Mobula alfredi) are the largest rays in the world, with wingspans reaching up to 7 metres. They are filter feeders, consuming vast quantities of zooplankton and small fish by swimming with their mouths open. Despite their size, manta rays are highly intelligent — they have the largest brain-to-body ratio of any fish, display complex social behaviours, and have been observed apparently recognising their own reflection, suggesting a degree of self-awareness.
Why It Matters
Manta rays are threatened by targeted fishing for their gill plates, used in traditional medicine, and by bycatch. Their slow reproductive rate — producing only one pup every two to three years — makes population recovery extremely slow.