well, since ima duck this make things a bit more difficult. My beak is sometimes wet and other times dry and it's tough as nails. On the other hand, I have feathers. These are just the physical characteristics of my duck self.

Ducks are protective and can be rough and get nasty if you bother their crew.

The physical characteristics align and the shell grew a rough texture for protection or utility that is beyond me at the moment.

Natually, I'm a coconut.

I see no other possibilities.