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A fin whale (Balaenoptera physalus) doesn't have teeth, being a baleen whale. It's baleen is made up of keratin, the same thing fingernails and hair are made of. They do develop tooth buds as fetuses, but these disappear before birth.

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Three: two pectoral fins and a dorsal fin.

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13y ago
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Usually one. Six fetuses were found in a fin whale caught off Iceland in the early 20th century.

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13y ago
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three

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12y ago
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