Nautilus Live provides a live view of the E/V Nautilus as it explores the ocean studying biology, geology, archeology, and more. The site also includes highlights such as this video of a siphonophore.
Siphonophores are actually made up of numerous animals even though they look like one animal. These amazing colonial organisms are made up up many smaller animals called zooids, and can be found floating around the pelagic zone in ocean basins. The Portugese Man O’ War is a famous siphonophore.
Each zooid is an individual, but their integration with each other is so strong, the colony attains the character of one large organism. Indeed, most of the zooids are so specialized, they lack the ability to survive on their own.
Related: Giant Star Fish and More in Antarctica – Hydromedusae, Siphonophora, Cnidarians, Ctenophores (what are jellyfish?) – Macropinna Microstoma: Fish with a Transparent Head – Large Crabs Invading Antarctic as Waters Warm
Here is another video from Nautilus, showing a large dumbo octopus: