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![Harry Davis, Fishery Research Biologist at the Milford Laboratory, changes water in cultures of clam larvae every other day and then adds food fizh2045.jpg Harry Davis, Fishery Research Biologist at the Milford Laboratory, changes water in cultures of clam larvae every other day and then adds food](/sites/default/files/styles/max_1300x1300/https/s3.amazonaws.com/s3-east-testmedia-noaa.woc.noaa.gov/dam/Photos/legacy/pl23_fizh2045.jpg?itok=PqkAlwXU)
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Harry Davis, Fishery Research Biologist at the Milford Laboratory, changes water in cultures of clam larvae every other day and then adds food. Glass, plastic, and stainless steel equipment is necessary as larvae are killed by ions fromother metals such as copper. (Image credit: NOAA Central Library Historical Fisheries Collection)