A study made in 2010 by Roman Amiot and his colleagues compared the teeth of spinosaurids like "", "", "Siamosaurus", and "" to other meat-eating dinosaurs. They found that spinosaurids had very semiaquatic (living partly in water, and partly on land) lifestyles. This means they lived in habitats like those of hippopotamuses, crocodiles, and turtles. It also means they could exist at the same time and place as other large predators without competing for food.