Best Siphonophore
The Portuguese man o' war, Physalia physalis, is a pelagic hydrozoan composed of specialized individuals functioning together as a colony, rather than a single jellyfish. Its gas-filled float remains at the sea surface and acts like a sail, while long tentacles trail beneath it to capture fish and o...
The bluebottle, commonly identified as Physalia utriculus in Indo-Pacific waters, is a colonial hydrozoan rather than a true jellyfish. Its visible body is a gas-filled float, while specialized individuals within the colony perform feeding, defense, and reproduction. Long tentacles carry stinging ce...
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 siphon...
Muggiaea atlantica is a calycophoran siphonophore, a colonial hydrozoan whose specialized individual units function together as one pelagic organism. It occurs in Atlantic waters and can become abundant in coastal seas when temperature, currents, and food conditions are favorable. Dense populations...
