Table 2: Comparison of Brain and Body Masses Between Relevant Elasmobranch Species

Body Mass (kg) Brain Mass (g)
Megachasma pelagios 1040 19.8
Cetorhinus maximus 385 20.7
Rhincodon typus 1388.115 35.435
Squalus acanthias 4.2 3.87
Carcharhinus leucas 83.8 54.36
Sphyrna mokarran 148.5 99.14
Galeocerdo cuvieri 200 107.5
Dasyatis americana 27.5 26.45
Mobula japanica 59.6 55.35
Manta birostris 165 122

The brain and body masses of three large bodied filter-feeding shark species, with similar lifestyle and feeding strategy: Megachasma pelagios [55], Cetorhinus maximus[47], Rhincodon typus [47], a more ancestral squalomorph shark Squalus acanthias [5],and galeomorph sharks from the upper portion of the polygon: Carcharhinus leucas[5], Sphyrna mokarran [9], Galeocerdo cuvieri [5], a ray from the upper portion of the polygon: Dasyatis americana [8] compared to the body and brain mass of Mobulajapanica and Manta birostris.