description Nanomia bijuga Overview
Nanomia bijuga is a species of colonial pelagic hydrozoan belonging to the order Siphonophorae, closely related to corals and jellyfish. Like other siphonophores, it is composed of specialized individual organisms called zooids that work together as a single functioning entity. As a physonect siphonophore, it features a gas-filled float and uses multiple specialized swimming structures called nectophores to move through the water column. The species has been extensively studied by marine biologists because its synchronized jet propulsion system demonstrates highly efficient multi-engine locomotion mechanics.
help Nanomia bijuga FAQ
What kind of animal is Nanomia bijuga?
Nanomia bijuga is a colonial pelagic hydrozoan in the order Siphonophorae. It is related to jellyfish and corals as a cnidarian, but its body is organized as a colony of specialized zooids.
Is Nanomia bijuga one animal or many animals?
It functions as one integrated colony even though it is made of specialized individuals called zooids. Different zooids handle propulsion, feeding, reproduction, and other tasks, much like organs in a larger organism.
How does Nanomia bijuga move through the water?
Its nectophores are specialized swimming zooids that propel the colony with jet-like movements. A pneumatophore acts as a float, while the extended stem carries the colony's other zooids. [Journal of Experimental Biology](https://journals.biologists.com/jeb/article/223/24/jeb233494/226050/Structure-and-function-of-the-nervous-system-in)
How long can a Nanomia bijuga colony become?
A colony can form a chain reaching up to around 30 centimeters, even though individual nectophores are only a few millimeters across. The size difference reflects its colonial design, with many small modules linked along one stem. [Scripps Zooplankton Guide](https://sio-legacy.ucsd.edu/zooplanktonguide/species/nanomia-bijuga)
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