Stargazer

Clown: The Clown gene gives dragons beautiful bright blue spots, which the dragons themselves can control. They can make their spots glitter in waves, to mimic a whole twinkling colony of glowworms hanging from a cave ceiling, or they can make just a few of their spots glow most intensely to draw in small prey items looking for a meal. The bioluminescence of the Clown gene is versatile but these dragons most often use it as a form of protective coloration; in caves already filled with bio-luminescent insects, fungus, and other forms of life, these dragons can more or less disappear instantly into their native cave environments, should they choose to do so, which is a helpful adaptation both for hunting and for defense for their homes from rival clans or wandering beasts.
Skink and Spinner: Dragons with Skink or Spinner genes have developed stripes of bioluminescence (green along their bodies, though their wings may have different colors entirely) that they use not just to illuminate their way in the dark of their caves, but also to hunt prey inside their cave systems. They can use the stripes and spots on their hides as glowing lures; they particularly enjoy twitching their bright tails along a tunnel as a lure, and then pouncing on any unlucky creature who falls for the ruse.
Peacock: Appears to now be an official gene! Current lore plan is that the gene are naturally evolved eye spots, to scare away predators that might not be deterred by normal bioluminescence...which might be concerning to think about, considering how large this dragon is...