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{{Short description|Species of shark}}
{{
| name = Horn shark
| image = Hornhai (Heterodontus francisci).JPG
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| synonyms = ''Cestracion francisci'' <small>Girard, 1855</small>
}}
The '''horn shark''' (''Heterodontus francisci'') is a species of [[bullhead shark]], in the family Heterodontidae. It is [[endemism|endemic]] to the coastal waters off the western coast of [[North America]], from [[California]] to the [[Gulf of California]]. Young sharks are segregated spatially from the adults, with the former preferring deeper sandy flats and the latter preferring shallower rocky [[reef]]s or [[algae|algal]] beds. A small species typically measuring {{convert|1|m|ft|abbr=on}} in length, the horn shark can be recognized by a short, blunt head with ridges over its eyes, two high [[dorsal fin]]s with large spines, and a brown or gray coloration with many small dark spots.
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* [http://www.flmnh.ufl.edu/fish/Gallery/Descript/HornShark/HornShark.html "Biological Profiles: Horn Shark" at Florida Museum of Natural History]
* [http://www.elasmo-research.org/education/ecology/kelp-horn_shark.htm "Kelp Forests: Horn Shark" at ReefQuest Centre for Shark Research]
* {{
{{Heterodontiformes}}
{{Taxonbar|from=Q934615}}▼
{{Good article}}
▲{{Taxonbar|from=Q934615}}
[[Category:Heterodontidae]]
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