Bicolored antpitta 
Bicolored conebill 
Bicolored frog 
Bicolored hawk 
Bicolored Wren 
Bicolour parrotfish 
Big Bend slider 
Big Hairy Armadillo 
Big-belly seahorse 
Big-eared Opossum 
Big-nosed chameleon 
Big-scaled Dwarf Gecko 
Bigeye Barracuda 
Bigeye scad 
Bigeye snapper 
Bigeye trevally 
Bighead Carp 
Bighorn sheep 
Bigmouth shiner 
Bignose unicornfish 
Binturong 
Bird wrasse 
Birdbeak burrfish 
Bitis caudalis