Giant siphonophores, like all siphonophores, are a collection of highly specialized working parts.
Some parts catch prey, others digest food, some parts reproduce and others direct the action by swimming.
This siphonophore is bioluminescent — it creates its own light.
When it bumps against something, its stem glows with a bright blue light.
This siphonophore can grow to lengths of 130 feet (40 m), longer than the blue whale, which is usually considered Earth's largest animal.
But the siphonophore's body is not much bigger around than a broomstick
Source
Some parts catch prey, others digest food, some parts reproduce and others direct the action by swimming.
This siphonophore is bioluminescent — it creates its own light.
When it bumps against something, its stem glows with a bright blue light.
This siphonophore can grow to lengths of 130 feet (40 m), longer than the blue whale, which is usually considered Earth's largest animal.
But the siphonophore's body is not much bigger around than a broomstick
Source