Sunday, July 31, 2016
Sunday, July 3, 2016
|An octopus jets across the ocean floor. Fwooosh!|
Photo: Albert Kok, Wikimedia
Especially when they typically move through the water by jet propulsion.
Octopuses (octopi?), like other cephalopods, have both a mouth, which sits in the center of their arms, and a tube-shaped organ called a funnel, or siphon, near their heads, that they use to breathe by bringing oxygenated water to their gills.
They also use the siphon to create their own personal jet propulsion, by filling up their muscular mantle cavity (their body, basically) with water and then quickly expelling the water out of the siphon. Fwoooosh.