The one on top, is the mother. She also happens to be Toothless's mate.
The bottom, obviously Toothless.
Now, the one in the middle, is a baby ShadowLightning.
Ever since he was little, he had the dream of learning to fly with his mother and father. He didn't know Toothless was his daddy until recently, so it was just an ordinary Night Fury. Also, all his brothers and sisters, they had the red tips. He was the only one who looked drastically like Toothless. Little ShadowLightning was always very sad about not having parents. Mommy left him, and technically, so did daddy. Although daddy thought he was dead.
Upon learning that Toothless is daddy, he throws a fit, and has daddy issues.
Turns out, good ole' Hookfang was the reason the other hatchlings were killed. He ate them, unaware that they belonged to Toothless.
Later, mommy is discovered dead, with three more hatchlings. These, don't belong to Toothless. There's one girl, and two boys. The girl looks like mommy, except it has yellow eyes. One boy has blue eyes and the other's kinda beat up. He also has yellow eyes.
Note: Toothless has GREEN eyes.
Yep... that's that.
Poor Shadow... never got a dream come true. He wanted to find his parents, and go flying with them. Of course, mommy's dead. So he can't have that dream come true.