Flipper (fin)
As Flipper (more rarely Pectoralflosse called), the pectoral fins of whales called. In English, the slang term is usually avoided, whereas it is more common in German.
The flippers contain bones in contrast to the fluke , the tail fin of the whales. Anatomically , the flipper corresponds to the front leg of land mammals .
The pectoral fins of the sea turtles are also known as flippers.
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Wiktionary: Flipper - explanations of meanings, word origins, synonyms, translations