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Rays

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"Unlike those of vertebrates, however, these are composed of a thickened basement membrane extending from the epidermis"

This distinction would be more useful if someone could explain how they are unlike ray fins in fish, whose composition is not described either here or on the fin ray section. The latter gives some general traits of rays and spines, but no technical information, followed by a description of Lepidotrichia. -- Shimmin Beg (talk) 10:37, 14 February 2013 (UTC)[reply]

Have you confused this article with another one? I can't find the sentence you quoted in the article on Fish fin, though it does occur in Chaetognatha. However those are not fish, so it is not the responsibility of this article to clarify the matter.. --Epipelagic (talk) 11:20, 14 February 2013 (UTC)[reply]
Gah. Sorry, yes, this was for Chaetognatha and I'll repost there. That being said, it would still be interesting to have some more detail here on the origin (as in, anatomical) and composition of spines and rays in fish fins; the Lepidotrichia section is a good start. -- Shimmin Beg (talk) 10:01, 17 February 2013 (UTC)[reply]

Dodgy claim

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It is said that the back legs of ungulates transformed into the tail of a whale. This is not true for whales, although it is true for seals where the back flippers consist of the hind legs. Some whales still have tiny leg bones in the middle of their bodies, not in their tails. The tail of a whale comes from the tail of the ungulate.Tallewang (talk) 18:57, 24 November 2013 (UTC)[reply]

Good catch. I've fixed it, and made a few other alterations. HCA (talk) 14:37, 25 November 2013 (UTC)[reply]
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Some redirect pages seem incorrect

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Pectoral fin currently redirects to fish fin, but this article doesn't describe the pectoral fins of other animals such as cetaceans. Should it be redirected to another article instead? Jarble (talk) 16:24, 15 April 2019 (UTC)[reply]

"Fins are usually the most distinctive anatomical features of a fish" verbiage

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  • Constitutes a tangential description, not a definition.
  • Entails "usually" as a WP:WEASELWORD that begs the question whether snake-like lampreys and hagfish without fins are somehow "unusual" fish.
  • Includes "the most distinctive" as WP:EDITORIALIZING as if gills are somehow less distinctive.

--Kent Dominic·(talk) 14:42, 17 September 2021 (UTC)[reply]

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