File:Detail of American paddlefish fry - 2013.jpg

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English: American paddlefish (Polyodon spathula) fry under the microscope at the Garrison Dam National Fish Hatchery in Riverdale, North Dakota, in the United States.

When they hatch, paddlefish babies (or "fry") are about the size of a thumbnail, and semi-transparent. This image shows some of the features of the fry. Arrows point to the small bump on the nose that will develop into the paddlefish's rostrum (its elongated bill), the minute eyes, and the small heart (flushed pink with blood).

The "corkscrew" is technically known as the "melamine plug". The plug blocks the digestive tract until the fry is mature enough to digest food. The it is absorbed by the fry at about two to three weeks of age, and disappears.
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Source https://www.flickr.com/photos/usfwsmtnprairie/9515281563/
Author Garrison Dam National Fish Hatchery. Fish and Wildlife Service. U.S. Department of the Interior.

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This image or recording is the work of a U.S. Fish and Wildlife Service employee, taken or made as part of that person's official duties. As a work of the U.S. federal government, the image is in the public domain. For more information, see the Fish and Wildlife Service copyright policy.

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United States Fish and Wildlife Service
United States Fish and Wildlife Service

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Date/TimeThumbnailDimensionsUserComment
current09:56, 30 August 2013Thumbnail for version as of 09:56, 30 August 2013960 × 720 (31 KB)Tim1965 (talk | contribs){{Information |Description ={{en|1=American paddlefish (''Polyodon spathula'') fry under the microscope at the Garrison Dam National Fish Hatchery in Riverdale, North Dakota, in the United States. When they hatch, paddlefish babies (or "fry") are a...

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