Hidden Fungaroid Pulziss

ORIGIN:
A creature that begins life as a tiny seed, then grows larger the more it isn't seen by anyone. It will continue to grow until it is finally seen by someone (even one of its own species)

ABILITIES:
Hidden Spurt: grows if not seen 
Tritennae: three probes can sense beings from far away
Crouch: bends over to become slug-like