Portuguese man-of-war, or bluebottle (Physalia physalis), is not a common jellyfish but a siphonophore, which is not actually a single multicellular organism but a colony of specialized minute individuals called zooids. These zooids are attached to one another & physiologically integrated to the extent that they are incapable of independent survival. Photo by Matthew Smith. #sea #ocean
Marrus orthocanna, una de las formas de vida más raras y bellas del planeta Los sinóforos (Siphonophora) son colonias de medusas que pueden medir hasta cientos de metros. La de la imagen, conocidad como Marrus orthocanna, es una colonia que habita las aguas pelágicas del Ártico, a una profundidad de entre 200 y 2000 metros.
Portuguese Man O' War (Physalia physalis), is a jellyfish-like marine invertebrate of the family Physaliidae. Its venomous tentacles can deliver a powerful sting. Despite its outward appearance, the Man o' War is not a jellyfish but a siphonophore, which differs from jellyfish in that it is not actually a single creature, but a colonial organism made up of many minute individuals called zooids.