B. giganteus may refer to:
Bathynomus giganteus, the giant isopod, the largest known isopod species Blaberus giganteus, the giant cockroach, one of the world's longest roach species Brachystephanus giganteus, a plant species found in Cameroon and Equatorial Guinea Burhinus giganteus, a large shorebird widespread around coasts from the Andaman Islands to Australia