It's shedding it's skin (molting). Tarantulas do it too. Basically their outer layer (exoskeleton) doesn't grow so they have to shed it off to reveal their aesthetics.
For those unaware, Alki David used to pay Zyzz to do live cam shows on his cam site called battlecam or something (srs). His wife is also hot as fuark:
...
That feel when good workout
That feel when people mirin
That feel when you look in the mirror and see progress
That feel when new pr
That feel when pump
That feel when people you haven't seen...