Editing Coral reef (section)

===Fish===
{{main|Coral reef fish}}
Over 4,000 species of fish inhabit coral reefs.<ref name="Spalding" /> The reasons for this diversity remain unclear. Hypotheses include the "lottery", in which the first (lucky winner) recruit to a territory is typically able to defend it against latecomers, "competition", in which adults compete for territory, and less-competitive species must be able to survive in poorer habitat, and "predation", in which population size is a function of postsettlement piscivore mortality.<ref>{{cite web |url=http://www.marinebiology.org/fishecology.htm |first= Jason |last=Buchheim |publisher=marinebiology.org |title=Coral Reef Fish Ecology |access-date=April 5, 2011}}</ref> Healthy reefs can produce up to 35 tons of fish per square kilometre each year, but damaged reefs produce much less.<ref name="McClellan">{{cite web |last1=McClellan |first1=Kate |last2=Bruno |first2=John|year=2008|url=http://www.eoearth.org/article/Coral_degradation_through_destructive_fishing_practices
|title=Coral degradation through destructive fishing practices |publisher=Encyclopedia of Earth |access-date= October 25, 2008}}</ref>