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An X-ray of an alewife fish

The alewife (Alosa pseudoharengus) is a species of small shad. There are anadromous and landlocked forms. The landlocked form is also called a sawbelly. This species is considered an invasive species and is now a commonly found in North American freshwaters.

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Filename: fish-alewifeblu.jpg
Copyright: Ted Kinsman / Science Source Inc.
Image Size: 10101x3510 / 13.4MB; radiograph radiographs x-ray ray rays x-rays xray xrays x ray x rays fish minnow alewife invasive freshwater
Contained in galleries: X-Rays

The alewife (Alosa pseudoharengus) is a species of small shad. There are anadromous and landlocked forms. The landlocked form is also called a sawbelly. This species is considered an invasive species and is now a commonly found in North American freshwaters.