Sea Grant researcher Wilbur Breese is checking the growth rate of cultured oyster spat. He set up a pilot oyster hatchery at Oregon State University's Marine Science Center in 1965. His investigations succeeded in unlocking mysteries of oyster reproduction and paved the way for establishment of commercial oyster seed hatcheries.
The man is holding wire bags full of broken Japanese oyster shells. Photo was used in "Native oyster investigations of Yaquina Bay, Oregon : Progress report II" by R. E. Dimick, George Egland, and J.B. Long overing the period July 4, 1939 to September 30, 1941. (Figure 26)