The Swedish Short-Snout dragon is a silvery-blue creature with long, pointed horns.
From the Story
Discovered in Book 4, Chapter 19, The Hungarian Horntail
"The Swedish Short-Snout dragon is one of the four dragons to be involved in the first task of the Triwizard Tournament. When Harry arrives at the dragon enclosure near the Forbidden Forest, the Swedish Short-Snout is snapping and snarling at the wizards on the ground. The dragon is hit with several Stunning Spells simultaneously by the dragon-keepers and falls to the ground, unconscious."
Discovered in Book 4, Chapter 20, The First Task
"Cedric Diggory picks the Swedish Short-Snout dragon as his opponent in the first task of the Triwizard Tournament. The dragon was momentarily distracted by the rock that Cedric Transfigured into a dog, but changed its mind halfway through and returned its focus to the Hufflepuff student."