アメリカ自然史博物館のインスタグラム(amnh) - 1月10日 13時02分

Here’s a gelatinous critter you’ll only find in cold, deep ocean waters: Meet Marrus orthocanna, a pelagic siphonophore. This marine organism is actually a colony: its long stem holds individual animals, called zooids (another example of a siphonophore is the Portuguese man-of-war). The zooids on the M. orthocanna handle different tasks, like feeding or reproduction, and are laid out in a specific repeating pattern. Fun fact: In World War II, it was discovered that submarines could hide from an enemy’s sonar under large groups of siphonophores—the sonar waves would scatter on their jelly-like bodies.
Photo: Kevin Raskoff, NOAA

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