Like almost all heterobranchs, blue dragons are hermaphrodites and their male reproductive organs have evolved to be especially large and hooked to avoid their partner's venomous cerata. Unlike most nudibranchs, which mate with their right sides facing, sea swallows mate with ventral sides facing. After mating, both individuals are able to lay eggs and can release up to 20 on an egg string, often laying them in wood pieces or carcasses. On average, G. atlanticus can lay 55 egg strings per hour. G. atlanticus is not globally panmictic, but is localized within ocean basins. Gene flow among Afro-Eurasian and American populations is thus hindered by physical obstructions and water temperatures in the Arctic and Southern Oceans.
While trudging through a snowstorm, Jon and his party sight a massive snow bear with blue eyes approaching them. The snow bear turns out to have been resurrected by a White Walker. The monstrous creature mauls and kills three of their company. Beric and Thoros manage to set the snow bear alight with his flaming sword but it continues to attack, forcing Thoros to get in its' way when it attacks Sandor, who is too terrified of the flames engulfing the beast even to defend himself. Thoros is unable to break free of its jaws until Jorah kills it with a dragonglass dagger. Beric cauterizes Thoros' wounds with his flaming sword. 59ce067264