Editing Amazon river dolphin (section)

===Diet===
[[File:Amazon dolphin eating fish.jpg|thumb|Amazon river dolphin feeding]]
The diet of the Amazon river dolphin is the most diverse of the toothed whales. It consists of at least 53 different species of fish, grouped in 19 families. The prey size is between {{convert|5|and|80|cm|in}}, with an average of {{convert|20|cm|in}}. The most frequently consumed fish belong to the families [[Sciaenidae]] (croakers), [[Cichlidae]] (cichlids), [[Characidae]] (characins and tetras), and [[Serrasalmidae]] (pacus, piranhas and silver dollars).<ref name="animaldiversity.org">{{cite web | url=https://animaldiversity.org/accounts/Inia_geoffrensis/ | title=Inia geoffrensis (Amazon river dolphin) | website=[[Animal Diversity Web]] }}</ref> The dolphin's dentition allows it to access shells of river turtles (such as ''[[Podocnemis sextuberculata]]'') and [[freshwater crabs]] (such as ''Poppiana argentiniana'').<ref name=acs/><ref name=deeAnn/><ref name="animaldiversity.org"/> The diet is more diverse during the wet season, when fish are spread in flooded areas outside riverbeds, thus becoming more difficult to catch. The diet becomes more selective during the dry season when prey density is greater.<ref name=best/>

Usually, these dolphins are active and feeding throughout the day and night. However, they are predominantly [[crepuscular]]. They consume about 5.5% of their body weight per day. They sometimes take advantage of the disturbances made by boats to catch disoriented prey. Sometimes, they associate with the distantly related [[tucuxi]] (''[[Tucuxi|Sotalia fluviatilis]]''), and [[giant otters]] (''[[Giant otter|Pteronura brasiliensis]]'') to hunt in a coordinated manner, by gathering and attacking fish stocks at the same time. Apparently, there is little competition for food between these species, as each prefers different prey. It has also been observed that captive dolphins share food.<ref name=acs/><ref name=deeAnn/>