Biologic evolution

It understood from setting up the seawater water tank of Waca.
It is a thing that shellfishes' Unco is brown.

The Midori color mussel has excreted the photograph.
Unco sinks at the bottom of the sea after it excretes.
Unco seems to be resolved by the flow of the sea.
It collected on sand in the water tank.
When time passes

It did not float on the water and it lived.
The temperature in the water tank is high because it is indoors put
with 26 degrees.
I think that it is a water temperature on the morning of summer in
case of the sea of nature.
The entire surface of the water becomes brown.
There is something that the photograph was taken before for the sea.

It is a brown sea of which it took a picture in June.
At that time, a wrong thing was noticed though it had when it was
generation of a brown plankton.
Because Unco of shellfishes and fish in bottom of the sea is resolved, I
think that it can ..floating on the water.. have done.