Seasmoke

Seasmoke was the name given by Laenor Velaryon to the dragon hatched to him. It was grey and white in colour. First Laenor and then later Addam of Hull rode Seasmoke in the Dance of the Dragons. Seasmoke was killed in the Second Battle of Tumbleton, alongside its rider, as well as two other dragons, Tessarion and Vermithor.