The spiracles typical of Chondrichthyes are present but they are vestigial, and mantas must swim continuously to keep oxygenated water passing over their gills.
Mantas must swim continuously to keep oxygenated water passing over their gills. The spiracles typical of Chondrichthyes are vestigial.
The spiracles typical of Chondrichthyes are vestigial. Mantas must swim continuously to keep oxygenated water passing over their gills.
The spiracles typical of Chondrichthyes are vestigial. Mantas must swim continuously to keep oxygenated water passing over their gills.