Traits

A soft with a unusually long body,  this trait like all impossible traits is  birth defect often caused by trauma or imperfections in the egg

Legs that are unusually short and stubby

Only the legs and head are made out of softstone, everything else is made out of goo 

Twins that merged together in the egg phase, each head has its own mind but they share a single life crystal

Their tail always has a split end 

The lower jaw never formed and is thus replaced  with goo, this significantly impacts the Soft's biteforce

This is a mutation that forms if Crystallized doesn't develop properly and it leaves the Liquid Soft with a fragile layer of hardened goo that constantly cracks under pressure 

Big chunks of hardened goo constantly form inside of this liquid soft's goo, making it sludgy and thicker than normal