Snowflake is a trait where an animal displays white spots that initially start small to non-existent and bloom or grow as the animal ages. The pattern that forms and blooms is usually somewhat transparent depending on the layer that develops within the chromatophore.
The gene attached to white patterning, similar to what we see from Pin and Harley, the gene then blooms with age as the white color and pattern grow into the animal.
White spots is the Snowflake trait. The name comes from the original description used for Leachies by Philippe De Vosjoli and was identified and adopted by AC to describe when he noticed this trait in his collection.
Often the animal doesn’t exhibit more than a few scales of white that can grow quite large by the time they hit 2 and it stops progressing.
No known proven lines
It should also be mentioned that Snowflake is separate to portholes.