Biologic evolution

I want you to see the color of the water pipe of hunting the
photograph.
It becomes glad and it has taken a picture because this had not been
seen in the life.
The interest was very attracted because it had seen only with the
frozen thing to having a tinge of the color of the water pipe of red.

Should I think about the color of the water pipe as a signature
before eggs is laid?
Hereafter, I want to examine it.

This photograph is a corbicula.
It is understood that there is a skin as well as the green willow
shellfish.
It thinks the green willow for the skin to exist to delay the invasion
of the shell with seawater.
Because the corbicula doesn't live in seawater, another idea is
necessary though it was thought that corbicula's skin was also similar.