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Argonaut...

Philippines: Anilao

View gallery (33 photos)

Argonaut sent on February 27, 2023 (16:45) by Marcello Di Francesco. 32 comments, 1701 views.  [editors pick]

, 1/200 f/22.0, ISO 500, hand held.

Uno degli incontri più incredibili di questo ultimo viaggio : L'argonauta, o Nautilus di carta, un piccolo polpo che nel genere femminile crea un guscio traslucido simile a una pergamena che utilizza per trasportare le uova in incubazione e per controllare il nuoto nella colonna d'acqua. Questa specie di polpo così insolita trascorre la sua vita alla deriva vicino alla superficie dei mari tropicali e subtropicali, lontano dai loro cugini cefalopodi che invece stanno molto più in profondità; . Le femmine sono molto più grandi dei maschi, circa otto volte più grandi e 600 volte più pesanti. Durante l'accoppiamento, il maschio introduce lo sperma all'interno della femmina. Così senza angoli o fessure e ripari del fondo dell'oceano in cui deporre le uova, la femmina assorbe la materia nei suoi stessi tentacoli. Dopo l'accoppiamento, inizia a secernere calcite dalla punta di due braccia, un processo continuo. Questo forma il guscio delicato e cartaceo. Depone le sue uova e poi si intrufola dentro lei stessa.



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avatarsenior
sent on March 26, 2023 (15:53) | This comment has been automatically translated (show/hide original)

Magnificent macro-sub image! Fantastic details and colors! Excellent caption! Congratulations Marcello and greetings, Massimiliano

avatarsenior
sent on March 26, 2023 (16:15) | This comment has been translated

Super!

avatarjunior
sent on March 26, 2023 (16:58) | This comment has been automatically translated (show/hide original)

Beautiful Marcello!

avatarjunior
sent on March 26, 2023 (17:09) | This comment has been translated

Thank you all!

avatarsenior
sent on March 26, 2023 (18:12) | This comment has been automatically translated (show/hide original)

Fantastic! Congratulations!

avatarsenior
sent on March 26, 2023 (18:24) | This comment has been translated

Thank you!

avatarsenior
sent on March 27, 2023 (10:11) | This comment has been automatically translated (show/hide original)

Met once by chance about thirty years ago in Sardinia (Gulf of Orosei), very close to the coast and "captured" with the net (obviously treated gently and then released). I must have had just 10 years (now it's 40 :-D), there was no google and at least 3-4 years passed before I could find out what it was (among other things by pure chance, doing a research on Argentina at school and browsing the encyclopedia in the area of lemmas that began with "Arg ..." I came across the photo of that strange animal met years before and there I discovered its name: Argonaut Argo!): of that event I have a terrible photo taken with the compact film camera! Wonderful catch!

avatarsupporter
sent on March 27, 2023 (15:00) | This comment has been automatically translated (show/hide original)

a spectacle of nature and a great shot ... :-)

avatarsenior
sent on March 31, 2023 (17:33) | This comment has been translated

Nice!

avatarsupporter
sent on April 08, 2023 (14:22) | This comment has been automatically translated (show/hide original)

Exceptional and beautifully taken image,
interesting caption.
As always, chapeau !!!!

avatarsenior
sent on April 08, 2023 (16:08) | This comment has been automatically translated (show/hide original)

Beautiful photos and explanations ... congratulations

avatarsenior
sent on February 20, 2024 (3:11) | This comment has been automatically translated (show/hide original)

Not even a designer could do things like that... !! You're a Martian Marcello. ?


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