Octopuses move with a simple elegance, but they have no rhythm.
Each of an octipus’s eight arms is soft, flexible and muscular, and acts as if it has an infinite number of joints. The cephalopods are bilateral symmetric, which means their left and right sides are mirror images of each other. Most bilateral-symmetric animals face forward when they are moving.
But octopuses can crawl in any direction relative to their body orientation. They don’t have to turn their bodies to change direction; one of an octopus’s arms can simply push off of a surface and propel the animal any which way.
The scientists also found that the octopus moves by shortening and elongating its arms, which creates a pushing thrust. The animal does not move by bending or pulling its arms, which simplifies matters for the creature.
The southern blue ringed octopus (Hapalochlaena maculosa) is an agile carnivorous predator. It will lure victim prey by wiggling the tip of an arm like a worm; or gliding nearby and pouncing and dragging prey towards its powerful beak-like jaws. Once bitten, the octopus injects it’s prey with poisonous saliva to kill it. This octopus produces venom that contains tetrodotoxin, 5-hydroxytryptamine, hyaluronidase, tyramine, histamine, tryptamine, octopamine,taurine, acetylcholine, and dopamine! #blueringoctopus. #bluering #octopus #cephalopod #predator #oceanimaging
The Thylacine was the largest known carnivorous marsupial of modern times. It is commonly known as the Tasmanian tiger (because of its striped lower back) or the Tasmanian wolf. Native to continental Australia, Tasmania and New Guinea, it is believed to have become extinct in the 20th century. It was the last extant member of its family, Thylacinidae; specimens of other members of the family have been found in the fossil record dating back to the late Oligocene.
The Thylacine had become extremely rare or extinct on the Australian mainland before British settlement of the continent, but it survived on the island of Tasmania along with several other endemic species, including the Tasmanian Devil. Intensive hunting encouraged by bounties is generally blamed for its extinction, but other contributing factors may have been disease, the introduction of dogs, and human encroachment into its habitat. Despite its official classification as extinct, sightings are still reported, though none has been conclusively proven.
About the video: Compilation of all five known Australian silent films featuring the recently extinct thylacines, shot in Hobart Zoo, Tasmania, Australia. Benjamin, the last specimen, is shown in the footage starting from 2:05. The clips are separated by fades.
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“Feather Starfish. [video]
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