What About The Fish?

This post comes from a class discussion we had in Sunday School this morning. Our teacher pointed out that in the key verse of our lesson, Genesis 7:23, it says that every living thing was destroyed that "was upon the face of the ground...", that he had not caught that detail until studying for this morning's lesson, and that he had always believed that all living creatures died. Upon further investigating the passage, it always mentions "every beast after his kind, and all the cattle after their kind, and every creeping thing that creepeth upon the earth after his kind, and every fowl after his kind, every bird of every sort." Nothing is ever mentioned of the fish dying. 7:22 gives further credence to the position that perhaps fish were not included: "...All in whose nostrils was the breath of life, of all that was in the dry land, died." What think ye?