Incredible Cephlaopods

Below is a fun fact-filled video about marine life. This one is about the octopus and includes great lines such as, "the octopus is sometimes referred to as the floppy floppy spider of the sea," and "they are the smartest of all invertebrates - technically not tons of competition there. Clams are dumb as hell." I find myself addicted to this series of marine life videos, I hope you enjoy learning while laughing.

If you are interested in reading more about cephlaopods, pick up a book written by Wendy Williams. "Kraken: The Curious, Exciting, and Slightly Disturbing Science of Squid.

Cephlaopod Facts:

  1. Octopuses have eight arms, and squid and cuttlefish have eight arms and two feeding tentacles (making them decapods). But the nautilus, another type of cephalopod, out numbers its brethren in terms of appendages: females have around 50 arms while males manage 90 or so. A single nautilus arm is less powerful than other cephalopods, but the arms are so numerous they can easily overpower prey.
  2. No species of cuttlefish lives on the East Coast of the United States, but there are more than 100 species that inhabit shallow waters in other parts of the world.
  3. Some species of squid can swim at speeds up to 25 miles per hour, as fast as some sharks, but only in short spurts.
  4. Neuroscientists in training learn the basics of neurosurgery by practicing on Loligo pealei squid. Their thick axon, thicker than any human nerves, is easier to start with.
  5. Some cephalopod ink contains the chemical dopamine, the neurotransmitter that, in human brains, produces the sensation of euphoria. (Scientists don't yet know what role dopamine plays in the squid world, though.)
  6. Humboldt squid, the large species now commonly found off the coast of California (and on the plates of California restaurants), can practice cannibalism.
  7. Male paper nautiluses, a type of octopus, are about a tenth the size of the females of the species. The male fertilizes the female by breaking off a special arm, which then swims to the female and deposits spermatophores into her.
  8. Giant Pacific octopuses can grow up to 400 pounds, though the ones that inhabit aquarium exhibits usually reach only 30 or 40 pounds in size. This species is smart, and aquarium managers are kept busy creating puzzles to challenge the octopuses' brains.
  9. The Humboldt squid can turn itself blood-red. Because this wavelength of light doesn't travel far underwater, a dark red squid is effectively invisible.



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