Well, the concept of this creature is that he absorbes sound with its skin and accumulates it in its shell on the tale, just like a camel uses its hump. This shell is also used to hurt enemies, just like these little horns on the creature's forehead. The crystal indicates his level of charge. When it's out of food, which is sound, the crystal goes red, and it's blinking when the level is low. Consequently, green means OK. Moreover, it can produce supersonic itself with these little dots, or pores, under the crystal. Also, this creature moves like a worm due to its shape.