other than the blue ringed octopus which is toxic, they are harmless to people. octopus are amazingly inteligent animals, and can remember a person that they met for up to two years without seeing them. they are naturally shy, but when aclimated to humans, they can be quite inquisitive.
Blue-ringed octopus is considered to be quite dangerous because it is extremely poisonous.
No, they are dangerous they are the only poisonous octopus and a bite from one can kill you.
I just read an article in National Geographic News that said that a new study, done April 2009, showed that all octopus, cuttlefish, and some squid are venomous. Here's the link: http://news.nationalgeographic.com/news/2009/04/090417-octopus-venom.html
On my calculations the blue ringed octopus is more dangerous than the blue lined octopus because it is very poisonous and it has no cure.
newtest3
An octopus
All octopus are oviparous - they lay eggs like all mollusks.
An octopus
Octopus Paul is an octopus which is the biggest star of Fifa worldcup2010 who made his all decisions correct
No. They are invertebrates. Gordon Grice author of Deadly Kingdom: The Book of Dangerous Animals
They are not endangered. Nor are they threatened. They are in fact sensitive to polluted waters.
There is no such thing as a tree octopus. It is not endangered. It was all just an internet hoax.