Biologic evolution

It will be because northern quahog sucks in the humors of Bloody clam, that the color of the shell of northern quahog becomes red sprays a shell with a water tube and a shell is made.

northern quahog（ホンビノス）の貝殻の色が
赤くなるのは、Bloody clam（赤貝）の体液を
northern quahog（ホンビノス）が吸い込み、水管で貝殻に吹き付けて貝殻を作るからだろう。