Talk:Amphioctopus marginatus

message: And the other bipedal-walking octopus is? -- ALoan (Talk) 11:08, 30 November 2006 (UTC)
thread_title: Comments

message: I realise you are just quoting the paper , but I think their assertin of tool use by the invertabrate is a bit of a thin claim. What about a hermit crab, for instance, which not only uses the "tool" but discards it when it finds a better one. Victuallers (talk) 14:40, 15 December 2009 (UTC)
replies: text: Hi, Vic. According to the AP article: "What makes it different from a hermit crab is this octopus collects shells for later use, so when it's transporting it, it's not getting any protection from it," Finn said. "It's that collecting it to use it later that is unusual."  --BorgQueen (talk) 14:45, 15 December 2009 (UTC)
replies: text: I see the point, maybe its worth adding that to the article as II jusr read the tool definition as the key point. Do feel free to delete/amend my edit. Thanks Victuallers (talk) 14:55, 15 December 2009 (UTC)

text: Making "later intended use" the nub of the criterion, seems to be the start of a slippery slope, since the researcher is required to speculate about the motive of the octopus - how does one interpret the action of a hermit crab that deliberately removes an anemone from where it is growing and transplants it to its shell - is it a deterrent or camouflage, something symbiotic or perhaps pure decoration? Androstachys (talk) 21:09, 15 December 2009 (UTC)
replies: text: I think part of the argument has to do with the difference between the instinctive vs. the cognitive behavior of an organism.  A hermit crab will attach an anemone to its shell NOT because it is thinking "Hey, if I stuck one of these to my shell, I might deter predators" but rather because it is thinking, "I am a hermit crab and one of the things I do is I take one of these and I put it there I have no idea why but I do" whereas the octopus, already a very highly intelligent animal, IS thinking, "Hey, these coconut shells... I wonder if I could make a shelter out of a bunch of them" and not just, "I am an octopus and I take these things and I put them there I have no idea why but I do."  The Octopus hasn't been doing this for millions of years like the hermit crab-- its behavior is recent and is a new adaptation to a change in its environment (the presence of the shells).  The hermit crabs aren't thinking about anything, but are just doing their best to follow a genetic program that happens to include the apparent "use" of anemones.  KDS4444Talk 11:24, 21 March 2013 (UTC)
thread_title: Comment2

message: The article mentions coconut "shell" but from the photo and context it appears this animal uses the husk, not the shell. --Una Smith (talk) 18:18, 15 December 2009 (UTC)
replies: text: I replied to you on WP:ERRORS. --BorgQueen (talk) 21:07, 15 December 2009 (UTC)
replies: text: I'll copy that discussion to this talk page, now that it seems to be finished.  --Una Smith (talk) 21:51, 15 December 2009 (UTC)

text: No, I clarified the sentence. --BorgQueen (talk) 21:07, 15 December 2009 (UTC)
replies: text: The video clips show them using coconut shells, not husks.  The shells are split in half, very suggestive of having been processed by humans.  This behavior (specifically using coconut shells) must be of very recent origin, because historically coconut shell was too valuable as a fuel source to ever throw away in the ocean.  --Una Smith (talk) 21:46, 15 December 2009 (UTC)

text: The way the ITN is phrased "The Veined Octopus (pictured) is observed to retrieve coconut shells and assemble them to use as shelter, making it the first invertebrate known to use tools" suggests the collecting and the assembling is what sets them apart as tool makers - not the case.81.159.89.69 (talk) 14:46, 15 December 2009 (UTC)
replies: text: Could it be rephrased as "The Veined Octopus (pictured) is observed to retrieve, store and modify coconut shells, assembling them to use as shelter, making it the first invertebrate known to use tools."?81.159.89.69 (talk) 14:47, 15 December 2009 (UTC)
replies: text: Ok, I will try it. --BorgQueen (talk) 14:49, 15 December 2009 (UTC)

text: Almost all the sources call it "shell", not husk. Do you have a source for it? --BorgQueen (talk) 18:42, 15 December 2009 (UTC)
replies: text: Sources on Google Books that distinguish husk from shell include these: .  When soaked in seawater the coconut husk soon splits open, releasing the intact shell.  The shell is very strong and does not normally open before the seed germinates on land, except when smashed open by humans.  So saying this octopus uses coconut shells implies the behavior is of relatively recent origin, after humans learned to process coconuts.  See the problem?  Where coastal coconuts are common, in the water husks are abundant but broken shells are not.  The octopus in the photo clearly has split pieces of husk:  they are thick and green.  --Una Smith (talk) 19:51, 15 December 2009 (UTC)
replies: text: Wait, which "photo" are you talking about? The photo on Main Page? No one said they are coconut shells. In fact, the file summary says they are seashells. --BorgQueen (talk) 19:55, 15 December 2009 (UTC)
replies: text: And yes, according to the AP article, the researchers believe that the particular behavior is of relatively recent origin, after humans learned to process coconuts: ... But once humans began cutting coconuts in half and discarding the shells into the ocean, the octopuses discovered an even better kind of shelter, Finn said. Why is it a problem? --BorgQueen (talk) 21:01, 15 December 2009 (UTC)
replies: text: Ah, I looked closer and the photo on the main page does show "seashells".  Now I have watched the video clip on the BBC website and it clearly shows coconut shells, not husks.  That is really cool;  the Wikipedia article doesn't do it justice.  --Una Smith (talk) 21:42, 15 December 2009 (UTC)
replies: text: Yes, we need a better image. Perhaps someone in Indonesia could provide one? :) --BorgQueen (talk) 21:46, 15 December 2009 (UTC)
thread_title:  Coconut 

message: My reading of the BBC article about this is that they are the first to make modifications to their collected items (hermit crabs collect shells, after all) and to store them with intent to use in the future, rather than using them straight away - those are what set them apart.81.159.89.69 (talk) 14:44, 15 December 2009 (UTC)
replies: text: The way the ITN is phrased "The Veined Octopus (pictured) is observed to retrieve coconut shells and assemble them to use as shelter, making it the first invertebrate known to use tools" suggests the collecting and the assembling is what sets them apart as tool makers - not the case.81.159.89.69 (talk) 14:46, 15 December 2009 (UTC)
replies: text: Could it be rephrased as "The Veined Octopus (pictured) is observed to retrieve, store and modify coconut shells, assembling them to use as shelter, making it the first invertebrate known to use tools."?81.159.89.69 (talk) 14:47, 15 December 2009 (UTC)
replies: text: Ok, I will try it. --BorgQueen (talk) 14:49, 15 December 2009 (UTC)

text: Almost all the sources call it "shell", not husk. Do you have a source for it? --BorgQueen (talk) 18:42, 15 December 2009 (UTC)
replies: text: Sources on Google Books that distinguish husk from shell include these: .  When soaked in seawater the coconut husk soon splits open, releasing the intact shell.  The shell is very strong and does not normally open before the seed germinates on land, except when smashed open by humans.  So saying this octopus uses coconut shells implies the behavior is of relatively recent origin, after humans learned to process coconuts.  See the problem?  Where coastal coconuts are common, in the water husks are abundant but broken shells are not.  The octopus in the photo clearly has split pieces of husk:  they are thick and green.  --Una Smith (talk) 19:51, 15 December 2009 (UTC)
replies: text: Wait, which "photo" are you talking about? The photo on Main Page? No one said they are coconut shells. In fact, the file summary says they are seashells. --BorgQueen (talk) 19:55, 15 December 2009 (UTC)
replies: text: And yes, according to the AP article, the researchers believe that the particular behavior is of relatively recent origin, after humans learned to process coconuts: ... But once humans began cutting coconuts in half and discarding the shells into the ocean, the octopuses discovered an even better kind of shelter, Finn said. Why is it a problem? --BorgQueen (talk) 21:01, 15 December 2009 (UTC)
replies: text: Ah, I looked closer and the photo on the main page does show "seashells".  Now I have watched the video clip on the BBC website and it clearly shows coconut shells, not husks.  That is really cool;  the Wikipedia article doesn't do it justice.  --Una Smith (talk) 21:42, 15 December 2009 (UTC)
replies: text: Yes, we need a better image. Perhaps someone in Indonesia could provide one? :) --BorgQueen (talk) 21:46, 15 December 2009 (UTC)
thread_title: From WP:ERRRORS

message: By the researchers' definition of a tool as "an object carried or maintained for future use", the behavior of A. marginatus is the first documented case of tool use in invertebrates. While the hermit crab re-uses a shell which it maintains, what makes A. marginatus different from the hermit crab is that A. marginatus collects shells for future use, so when the octopus is transporting the shell, it is not getting protection from the shell. The researchers considered this highly unusual behavior. 
I have taken issue with this section before and feel that it remains contentious.
The researchers' definition of a tool is not shared by the mainstream scientific community. Did they invent this definition or had it been used before? The WP article Tool does not reflect the 'future use' idea. Taking this flawed and very parochial definition and using it to make the statement 'first documented case of tool use in invertebrates' is quite simply an abuse of logic and should have no place in the article. I am removing this section and ask that it not be re-used without being discussed by a wider group of editors. Androstachys (talk) 06:04, 5 April 2011 (UTC)
replies: text: And be that as it may, I have just removed a final sentence or two containing the analysis of an editor claiming to refute the findings of the researchers.  If we choose not to repeat a parochial and flawed definition of what "tool use" is (I would argue that it is not our place as editors to make such a decision, but rather to report that such a claim has been made in the published literature and to only refute it with additional citations in the same body of literature that argue otherwise) we also cannot make novel uncited arguments as to why we may personally believe that the argument is invalid.  We are not here to evaluate the findings of researchers, we are here to make an encyclopedic record of those findings to the extent that such findings are published and notable-- and to do so whether or not we "agree" with those arguments.  Yes?  KDS4444Talk 11:15, 21 March 2013 (UTC)
replies: text: I have recently been doing some editing of Tool use by animals.  What constitutes a "tool" is highly contentious and sometimes it appears researchers give difinitions to exclude animals arbitrarily (especially invertebrates it seems).  I see relatively little difference between the behaviour of hermit crabs and their shells, and the coconut carrying of the veined octopus, other than the apparent recency of the latter (although this might have been ocurring for years without our knowledge - note the scallop shell in the picture; these are not a recent "event").  By the way, hermit crabs will select shells to match their surroundings.__DrChrissy (talk) 19:01, 25 August 2013 (UTC)
thread_title:  Tool use 

message: Hello! This is a note to let the editors of this article know that :File:Octopus shell.jpg will be appearing as picture of the day on May 20, 2012. You can view and edit the POTD blurb at Template:POTD/2012-05-20. If this article needs any attention or maintenance, it would be preferable if that could be done before its appearance on the Main Page so Wikipedia doesn't look bad. :) Thanks! —howcheng  {chat} 19:40, 19 May 2012 (UTC)
thread_title:  [[:File:Octopus shell.jpg]] to appear as POTD soon