Biologic evolution

Shape of shell of mussel that is shape of boots.
It was not a new kind of the boots type, and a lot of mussels of this boots
type were nothing but seen the desire because of the external cause as the
change.


It took a picture of the one that mussel's shell was transformed.




I think that it transformed it because of the external cause.
The mussel of this shape has not seen.
Transforming it by what reason is uncertain.