American paddlefish (<i>Polyodon spathula</i>) at 60 days of age at the Garrison Dam National Fish Hatchery in Riverdale, North Dakota, in the United States.
By the time they are 60 days old, juvenile American paddlefish have assumed the look of an adult paddlefish. Fish this size which are raised in hatcheries can be tagged so they may be identified later in the wild.
Garrison Dam National Fish Hatchery. Fish and Wildlife Service. U.S. Department of the Interior.
2013-08-06
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