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Species that do need to swim continuously to breathe go through a process known as sleep swimming, in which the shark is essentially unconscious. It is known from experiments conducted on the spiny dogfish that it's spinal cord, rather than it's brain, coordinates swimming, so spiny dogfish can continue to swim while sleeping, and this also may be in case in larger shark species.
"spiny dogfish that its spinal cord, rather than its brain"
"and this also may be the case in larger shark species"
Life span is over(!) 200 years for the greenland shark, and 100 years for whale shark. Also, the spiny dogfish article has no info on lifespan, only maturity age. Web gives different numbers; A quick search gives me lifespan of 45, 70 and 100 years. I added a great reference site (Canadian Shark Research Laboratory) but the article might need a professional hand to add a "Life history" section. Thx. 184.108.40.206 (talk) 00:36, 21 August 2013 (UTC)
The Yucatec Maya etymology is attractive and often cited by Internet sources, but the little-known attestation of shark in a mid-15th-c. English document rules out any such hypothesis. The word is embedded in a Latin text as le Shark. The ostensibly French definite article simply tags the quoted word as non-Latin (according to the Anglo-Latin conventions of the time) and does not imply a French etymology. Piotr Gąsiorowski (talk) 05:44, 2 February 2014 (UTC)
In Arabic the word is Krsh (the mirroring of SHARK) It's in the Arabic dictionary Lisan Al-Arab, written during the 13th century, long before the English usage of the word. --Mando Salama (talk) 10:52, 2 February 2015 (UTC)
I'm working on shark conservation at the European Commission. In this function I am not supposed to make direct edits in Wikipedia. Instead, I was encouraged to suggest edits on the corresponding talk pages so that others can implement them in the actual article if they agree. I hope this is an acceptable and correct approach.
I had realised that in the section on "Protection" the respective legislation and policies of other countries and organisations are described, but information on the steps the EU has taken to stop shark finning is missing. Therefore I suggest adding the following paragraph:
The European Union has had a general shark finning ban since 2003 for all vessels of all nationalities in Union waters and for all vessels flying a flag of one of its member states. This prohibition was amended in June 2013 to close remaining loopholes in EU legislation, now one of the few with a strict "fins attached" policy in the world.
As I understand it, this is exactly the correct approach when trying to manage a conflict of interest (see also WP:COI). On the proposed changes, my initial thought is that this mainly belongs under Shark finning#European Union (which more-or-less covers this ground aleady). The problem then is how to incorporate suitably prominent links (eg "See also" or "Main article" type links) to Shark_finning#International_restrictions and Shark_finning#National_restrictions into Shark#Protection. Presumably this needs a more general summary of shark finning legislation (and any other controls) than the current US-centric paragraph. I'll take a proper stab at this in a day or so unless someone else gets there first.TuxLibNit (talk) 21:28, 29 August 2014 (UTC)
it is not just finning, sharks are hunted for their squalene in their livers. The article should reflect that V8rik (talk) 20:42, 15 September 2014 (UTC)
Added a slightly modified version of the text above. This page have a 'history' of protection of sharks, EU law on shark protection is relevant on the page. Shark the shark finning page already have text about this. --Stefantalk 07:59, 25 September 2014 (UTC)