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Smithsonian National Zoological Park: Giant Pacific Octopus". Nationalzoo.si.edu. Archived from the original on 23 February 2014 . Retrieved 4 February 2014. Octopuses are highly intelligent. [100] Maze and problem-solving experiments have shown evidence of a memory system that can store both short- and long-term memory. [101] Young octopuses learn nothing from their parents, as adults provide no parental care beyond tending to their eggs until the young octopuses hatch. [71] :75 Meyers, Nadia. "Tales from the Cryptic: The Common Atlantic Octopus". Southeastern Regional Taxonomic Centre . Retrieved 27 July 2006. Wait a moment – your day/peak and night/ off-peak readings will show up on the screen one after the other, starting with off-peak.

Octopus reproductive organs mature due to the hormonal influence of the optic gland but result in the inactivation of their digestive glands. Unable to feed, the octopus typically dies of starvation. [76] Experimental removal of both optic glands after spawning was found to result in the cessation of broodiness, the resumption of feeding, increased growth, and greatly extended lifespans. It has been proposed that the naturally short lifespan may be functional to prevent rapid overpopulation. [77] Distribution and habitat Octopus cyanea in Kona, HawaiiWells, M. J. (1978). Octopus, Physiology and Behaviour of an Advanced Invertebrate. Springer Science+Business Media. ISBN 978-94-017-2470-8. Stevenson, Angus; Lindberg, Christine A., eds. (2010). New Oxford American Dictionary (3rded.). Oxford University Press. ISBN 978-0-19-539288-3. Octopuses are gonochoric and have a single, posteriorly-located gonad which is associated with the coelom. The testis in males and the ovary in females bulges into the gonocoel and the gametes are released here. The gonocoel is connected by the gonoduct to the mantle cavity, which it enters at the gonopore. [26] An optic gland creates hormones that cause the octopus to mature and age and stimulate gamete production. The gland may be triggered by environmental conditions such as temperature, light and nutrition, which thus control the timing of reproduction and lifespan. [67] [68] Octopuses are generally solitary creatures. Sometimes they will hunt together, but typically only members of the same species since other species will have different schedules and hunting methods. You can generally find Giant Pacific Octopuses in as shallow water as a tidal pool and down to such depths of 5000 feet (1,524 m). Their ideal habitat is in and around areas with a soft substrate, like mud or sand. They are often found in groups near kelp fields for large feeds. Interestingly, even though they have such a wide-ranging habitat, they are ectothermic, with a metabolism that depends on water temperature. 9. Seven-Arm Octopus (Haliphron atlanticus)

Like other cephalopods, octopuses have camera-like eyes, [48] and can distinguish the polarisation of light. Colour vision appears to vary from species to species, for example being present in O. aegina but absent in O. vulgaris. [57] Opsins in the skin respond to different wavelengths of light and help the animals choose a coloration that camouflages them; the chromatophores in the skin can respond to light independently of the eyes. [58] [59] a b c Kröger, Björn; Vinther, Jakob; Fuchs, Dirk (2011). "Cephalopod origin and evolution: A congruent picture emerging from fossils, development and molecules". BioEssays. 33 (8): 602–613. doi: 10.1002/bies.201100001. ISSN 0265-9247. PMID 21681989. S2CID 2767810. For your off-peak reading, you'll see “IMP R01” onscreen. A second later, you'll see your meter reading: eight digits, with “kWh” towards the bottom right of the screen.Your electricity reading will be a number followed by “KWH”. We don't need the numbers after the decimal place. Dumbo Octopuses live on the ocean floor anywhere from 9,800 (2,987 m) to 13,000 feet (3,962.4 m) deep, making them the deepest living of all the known octopus species. They have the typical fins on their mantle that make them look like they have huge ears, similar to the elephant in Disney’s 1941 film. 11. Coconut Octopus (Amphioctopus marginatus) The Animals (Scientific Procedures) Act 1986 Amendment Regulations 2012". The National Archives . Retrieved 18 February 2015. We can’t look at the biggest octopus, the Giant Pacific Octopus, so we can’t leave out the smallest and still have a complete list. The smallest octopus in the ocean is the Atlantic Pygmy or Dwarf Octopus. They measure only 5 ½ inches (13.9 cm) long, and 3 of those inches (7.6 cm) are their tentacles. Most of the adults belonging to this breed weigh only a single ounce.