Species code No. of strong tritrophic food chains as top species No. of strong tritrophic food chains with omnivory as top species Genera Species Body mass F38 293 164 Carcharhinus perezi 25800 F201 158 22 Sphyrna lewini 103420 F34 155 42 Carcharhinus falciformis 90300 F40 146 52 Negaprion brevirostris 28380 F41 141 49 Rhizoprionodon porosus 1295 F33 131 25 Carcharhinus acronotus 23220 F39 119 28 Galeocerdo cuvier 173376 F208 119 22 Mustelus canis 3870 F202 117 43 Sphyrna tiburo 4644 F66 117 20 Ginglymostoma cirratum 129000