Threespine Stickleback

Gasterosteus aculeatus

Summary 2

The three-spined stickleback (Gasterosteus aculeatus) is a fish native to most inland coastal waters north of 30°N. It has long been a subject of scientific study for many reasons. It shows great morphological variation throughout its range, ideal for questions about evolution and population genetics. Most populations are anadromous (they live in seawater but breed in fresh or brackish water) and very tolerant of changes in salinity, a subject of interest to physiologists. It displa

Sources and Credits

  1. (c) Liam O'Brien, some rights reserved (CC BY-NC), http://www.inaturalist.org/photos/494116
  2. (c) Wikipedia, some rights reserved (CC BY-SA), http://en.wikipedia.org/wiki/Gasterosteus_aculeatus

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