The answer is very simple. Jellyfish are cnidarians. Octopi are not. Because the octopus does not have the same head structure as the jellyfish. Also octopi are cephalopods. They are closer to mollusks in the bases of things but the tentacles are different. Just because they have tentacles does not mean they are in the same categories. But octopi and squid are in the same category as mollusks such as snails. That is a different story though. But that is why they are not the same.
The same as fish. (a school)
some bioluminescent animals would be jellyfish octopi and squid
Octopi
A group of jellyfish is called a "smack".FlutherA group of jellyfish is sometimes called a bloom or a swarm.A group of jellyfish is sometimes called a bloom or a swarm.
A group of jellyfish is sometimes called a bloom or a swarm.
A squid is an invertebrate, meaning it is not classified the same way as a fish. A group of squid is called a "shoal." Currently there is a movement to change the official name from shoal to "squad."
The animals that live at bondi bach are: stonefish, box jellyfish, blue ringed octopi and lifeguards!
A group of jellyfish is sometimes called a bloom or a swarm.
Octopi are animals they do not have ethnic groups.
It's a Smack of Jellyfish :)
a box of jellyfish A group of jellyfish is sometimes called a bloom or a swarm.