Crab

Crab was a newborn male dragon who died only days after his hatching. He was the firstborn son of Princess Drown and Prince Frost-Paw. His grandparents were Queen Peak and King Alpine, who currently rule the Lune Mountains. Since Crab was destined to be the future king of the Lune Mountains, his birth was highly anticipated by not only his family, but also the whole dragon kingdom residing in the Lune Mountains.

Not enough is known about Crab, including his Dragon Blood. His only mention is in the epilogue of The Royal Twins of the Lune Mountains, by his brother Tundra, the only hatchling of Drown and Frost-Paw that has survived birth.

Biography
According to Tundra, Crab was healthy upon hatching, but died peacefully and mysteriously in his sleep exactly four days later, which shocked the whole kingdom. This was sheer unluckiness because two years after Crab's death, Drown and Frost-Paws' next egg died as well. The second hatchling, who's name was decided to be Sea Catcher prior to her birth, emerged halfway out of her egg before passing away, most likely from exhaustion.

In The Royal Twins of the Lune Mountains, before Tundra left the mountains to track down his older cousin Winston, he visited the graves of Crab and Sea Catcher with his parents.