Brachiosaurus was a large member of the Sauropods. The Sauropods were a group of dinosaurs that had a large body, walked on four (4) legs, and had a long tail and neck. On top of the long neck was a small head. Brachiosaurus was different from other Sauropods because its nostrils were on top of its head. The dinosaur could have dipped its head in an ocean for seaweed, and it could still breathe.