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Female giant Pacific octopus guarding strings of eggs. The eggs have large yolks; cleavage (division) is relatively shallow and a germinal disc develops at the pole. During gastrulation, the disc and surround the yolk, forming a yolk sac, which eventually forms part of the gut. The embryo forms as the dorsal side of the disc grows upward, with ...
Argonauta nodosus [previously known as Argonauta nodosa [3] [4] [5]], also known as the knobby or knobbed argonaut, is a species of pelagic octopus.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 (hence the name paper nautilus).
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, hence the name paper nautilus. A. argo is thought to feed primarily on pelagic molluscs. The species is preyed on by numerous predators.
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 (hence the name paper nautilus). The shell is usually approximately 80 mm in length, although it can exceed 90 mm in exceptional specimens; the world record size is 95.5 mm. [ 2 ]
A family chronicled their pet octopus’s ... their Californian adult female octopus bimaculoide - called “bimacs” for short - named Terrance laid 50 eggs in December that began hatching in ...
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 (hence the name paper nautilus). The shell is usually approximately 150 mm in length, although it can exceed 200 mm in exceptional specimens; the world record size is 220.0 mm. [ 1 ]
This also makes it the longest-living octopus – most octopuses only live for 1 or 2 years – which this octopus beats with its brooding period alone. [4] [5] Female Graneledone boreopacifica tend to brood their eggs between the depths of 1,200 and 2,000 metres (3,900 and 6,600 ft); the eggs were never unattended. [3]
Scavengers and other organisms often attempt to eat octopus eggs, even when the female is present to protect them. Giant Pacific octopus paralarvae are preyed upon by many other zooplankton and filter feeders. Marine mammals, such as harbor seals, sea otters, and sperm whales depend upon the giant Pacific octopus as a source of food.