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Male Paper Nautilus - Argonauta hians This Male Paper Nautilus - Argonauta hians is very small in size around 6-8 mm.  It was hitching a ride on something else when I first saw it, this is a typical of their behaviour.  They have also been seen to hitch rides on Jellyfish and other floating animals in blue water.<br />
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Male Paper Nautilus do not have shell unlike the female.  Females are usually march larger in size.<br />
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An interesting fact about Argonauts - The males only mate once in their short lifetime, whereas the females are iteroparous, capable of having offspring many times over the course of their lives. Anilao,Argonaut,Argonauta hians,Batangas,Nautilus,Paper Nautilus,Philippines,Winged Argonaut Click/tap to enlarge PromotedSpecies introCountry intro

Male Paper Nautilus - Argonauta hians

This Male Paper Nautilus - Argonauta hians is very small in size around 6-8 mm. It was hitching a ride on something else when I first saw it, this is a typical of their behaviour. They have also been seen to hitch rides on Jellyfish and other floating animals in blue water.

Male Paper Nautilus do not have shell unlike the female. Females are usually march larger in size.

An interesting fact about Argonauts - The males only mate once in their short lifetime, whereas the females are iteroparous, capable of having offspring many times over the course of their lives.

    comments (7)

  1. Incredible! Posted 7 months ago
    1. Thanks, Ferdy :) Posted 7 months ago
  2. That is really awesome! Posted 7 months ago
    1. Thanks, Christine :) Posted 7 months ago
  3. From today's JungleDragon Facebook post:

    What is it?? It's a Winged Argonaut (Argonauta hians)! Argonauts are an unusual group of pelagic octopuses. They live in tropical waters worldwide and resemble other octopuses as they have rounded bodies and eight arms. But, unlike other octopuses, argonauts live close to the ocean surface rather than on the seafloor. And, argonauts take sexual dimorphism to the extreme: females can grow to 40 cm and are up to 600 times heavier than their petite male counterparts, who rarely surpass 2 cm! Argonauts are also called paper nautiluses because the females secrete a thin, translucent, brittle shell. It's not a true cephalopod shell, but is rather an innovative adaptation that is only seen in the genus Argonauta. This shell acts like a brood chamber and helps maintain buoyancy.

    As for reproduction, argonauts do not disappoint. It is assumed that males only mate once in their short lifetime, but females are able to mate multiple times and produce many offspring during their longer lives. While there are many aspects of their mating behaviors that are not completely understood, we do know that when they mate, the males leave more behind than just sperm. Males have a modified arm, called a hectocotylus, which acts like a penis. They insert this arm into the female, deposit sperm, and then snap the arm off—leaving it inside the female...where it stays, forever. It's not clear if the male dies after copulation or if he can regenerate his hectocotylus. But, alas, all is well for the mated female, who deposits her eggs in her shell where she can keep them safe. So, in the end, it's just the female, cozy in her shell with her eggs and her mate's disembodied penis-arm. Weird, but true. {Spotted in the Philippines by JungleDragon moderator, Albert Kang} #JungleDragon
    Posted 6 months ago
    1. Thanks, Christine for featuring this observation :) Posted 6 months ago
      1. You're welcome, Albert! It's a fantastic shot...as usual ;) Posted 6 months ago

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''Argonauta hians'', also known as the winged argonaut, muddy argonaut or brown paper nautilus, is a species of pelagic octopus. The common name comes from the grey to brown coloured shell. The Chinese name for this species translates as "Grey Sea-horse's Nest". The female of the species, like all argonauts, creates a paper-thin eggcase that coils around the octopus much like the way a nautilus lives in its shell . The eggcase is characterised by a wide keel that gives it a square appearance, few.. more

Similar species: Octopuses
Species identified by Albert Kang
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By Albert Kang

All rights reserved
Uploaded Jan 4, 2019. Captured Jan 2, 2019 02:02.
  • TG-5
  • f/14.0
  • 1/100s
  • ISO800
  • 18mm