Fig. 2
From: Sightings trends and behaviour of manta rays in Fernando de Noronha Archipelago, Brazil
Images showing distinguishing morphological characteristics of the ventral surface (top), dorsal surface (middle) and the caudal base with or without the calcified residual spine bottom), between manta ray species: a M. birostris, b M. alfredi and c individuals sighted at Fernando de Noronha Archipelago. Illustrations (a) and (b) modified from Marshall et al. (2009)