Seasmoke was a pale silver-grey dragon of Dragonstone. Seasmoke was the pride and passion of Laenor Velaryon.
Jacaerys Velaryon called for dragonriders during the Dance of the Dragons. Seasmoke killed one of his kingsguard, Steffon Darklyn, during an attempt. Later, Addam Velaryon rode it.
Seasmoke fought Tessarion and Vermithor in the Second Battle of Tumbleton. The latter was the one to kill Seasmoke.