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--- dolphins [2021/09/27 04:35]
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+++ dolphins [2022/04/08 07:48] (current)
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 ==== Communication ====
 Dolphins communicate both verbally and non-verbally. They can communicate through their tail movements, the way they swim, or the way they strike certain poses. In addition, they have a rich language consisting of special high-frequency clicks and whistles. By means of sounds, they can inform each other of danger, show their emotional state or call younger, unruly dolphins to order. [([[https://dolphins.org/communication|Dolphins' Research Center]])]
+==== Breathing ====
+Because dolphins cannot breathe underwater, they must swim to the surface of the ocean to breathe. [([[https://www.whalefacts.org/can-dolphins-breathe-underwater/|Whale Facts]])]
+==== Pregnancy ====
+Depending on the species, most female dolphins carry their babies from 9 to 17 months. [([[https://www.oceanrider.com.au/2020/01/26/baby-dolphins/|Ocean Rider]])]
+==== Teeth ====
+Dolphins do not use their 100 teeth to eat but to catch fish, which they then swallow whole. In fact, they do not have jaw muscles for chewing food. [([[https://www.jervisbaywild.com.au/blog/7-unusual-facts-about-dolphins/|Jervis Bay Wild]])]
+==== Predators ====
+Dolphins are predators. Fish, squid, and crustaceans are on their prey list. A 130-kilogram dolphin eats about 16 kilograms of fish per day. [([[https://seaworld.org/animals/all-about/bottlenose-dolphin/diet/|Sea World]])]
+==== Echolocation ====
+It is believed that echolocation is an evolutionary process and that dolphins did not always have this ability. [([[https://www.sciencedirect.com/topics/agricultural-and-biological-sciences/echolocation|Science Direct]])]
+==== Very social ====
+Dolphins are very social, living in groups that hunt and even play together. Large groups of dolphins can have a thousand or more members. [([[https://us.whales.org/whales-dolphins/what-is-a-group-of-dolphins-called/|US Whales]])]
+==== Nursing ====
+A dolphin nurses is young for up to two years. The young stay with their mothers anywhere from three to eight years. [([[https://www.dolphins-world.com/how-do-dolphins-raise-their-young/|Dolphins World]])]
+==== "The Cove" ====
+"The Cove" is an Academy Award-winning documentary about dolphin treatment in Japan. It discusses cruelty to dolphins and the high risk of mercury poisoning from eating a dolphin. [([[https://japantoday.com/category/entertainment/the-cove-wins-oscar-for-best-documentary|Japan Today]])]
+==== Sharp eyesight ====
+Dolphins have sharp eyesight both in and out of the water. They can hear frequencies 10 times higher than the upper limit of adult humans. [([[https://www.sciencedirect.com/topics/agricultural-and-biological-sciences/dolphins|Science Direct]])]
+==== No sense of smell ====
+Dolphins have no sense of smell. [([[http://calvertmarinemuseum.com/DocumentCenter/View/823/Bugeye-Times-Fall-2012?bidId=|Calvert Marine Museum]])]
 {{tag>biology science society}}

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