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Summary

Description
English: The absence of the dorsal fin is reflected in the genus name of the species - apterus is the Greek for "wingless". The evolutionary preference for a dorsal ridge in favor of a fin is believed by scientists to be adaptation to under-ice conditions, or possibly as a way of preserving heat.
Date
Source Beluga Whales
Author Leon Mitchell from San Diego, USA

Licensing

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This image was originally posted to Flickr by tigrecanela at https://www.flickr.com/photos/12168606@N00/480865138. It was reviewed on 20 March 2008 by FlickreviewR and was confirmed to be licensed under the terms of the cc-by-sa-2.0.

20 March 2008

Captions

Two beluga whales.

Items portrayed in this file

depicts

1 May 2007

image/jpeg

85596a30b42727120c749e00e0a482be49b43ffc

669,038 byte

898 pixel

1,200 pixel

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Date/TimeThumbnailDimensionsUserComment
current00:01, 20 March 2008Thumbnail for version as of 00:01, 20 March 20081,200 × 898 (653 KB)Serg!o{{Information |Description= {{en|The absence of the dorsal fin is reflected in the genus name of the species - apterus is the Greek for "wingless". The evolutionary preference for a dorsal ridge in favor of a fin is believed by scientists to be adaptation

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