A Croc born Deaf cannot hear its surroundings. Though can because the croc to be in harms way this mutation is not dangerous to the croc. Though a deaf croc tend to be more creative when it comes to intelligence, their other senses become stronger.
When design a croc they can have ears or be ear-less if ear-less the spot where the ear was needs to have a visible ear canal.
This mutation can be rolled during an inbreeding and is not passable to it offspring. It also causes a -1 to defense and +1 to intelligence skill points.
Skill points:
ATK: 0 DEF: -1 SPD: 0 INT: +1Â
Ear-less example