There are currently four species confirmed, with six more under research. Identified in 1929, they belong to the Animalia Kingdom and the Mollusca Phylum, the Cephalopoda Class and the Octopoda Order. They are in the Octopodidae family, and the genus of Hapalochlaena. The Blue-lined octopus species is Hapalochlaena fasciata (fasciata being the species part of the binomial), the Greater blue-ringed octopus is Hapalochlaena lunulata, the Southern blue-ringed or Lesser blue-ringed octopus is Hapalochlaena maculosa, and Hapalochlaena nierstraszi doesn't seem to have a "popular" name, though it was originally identified in 1938.

Spiders and octopuses belong to different phyla: spiders are arachnids (part of the arthropod phylum) and octopuses are cephalopods (part of the mollusk phylum). While both groups are invertebrates, they are not closely related through common ancestry.

Octopuses are the most intellectual marine animals. They can memorize, mimic and solve problems in labs. There have been many cases in which octopuses escaped from their tanks. To answer your question correctly, the scientific name of the common octopus is Octopus vulgaris.

Squid by far. Squid by far.

Then will not get to fight because spiders live on land and octopuses live in the ocean

The octopus completely lacks any bones in its body.

Octopuses have three hearts. Two branchial hearts pump blood through each of the two gills, while the third pumps blood through the body.

Some are eaten by alligators and birds of prey will eat some of the smaller ones

a octopus swim abouth 12 or 14.

none. they have tentacles.

56 chromosomes in a regular octopus

Paul the Octopus, the magnificent octopus who predicted the games' outcomes in the 2010 FIFA World Cup, died of natural causes at the Oberhausen Sea Life Center in western Germany on October 26, 2010. The average life-span of an octopus is three years.

When a octopus is scared it spreads ink

shag

a squid- ten tentacles.

5 to 6 feet

they live in the twilight zone

yes

My brother caught one the size of a fist, but on this website: http://www.barrierreefaustralia.com/the-great-barrier-reef/blueringedoctopus.htm

it says "The blue-ringed octopus is the size of a golf ball but its poison is powerful enough to kill an adult human in minutes"

Domain - Eukarya, kingdom - Animalia

The longest part of the octopus is the arms

Yes. Octopus will eat fish, though they eat other things as well, with crabs high o the list.

It can make itself change from blue to green, red to brown and yellow to orange.

well it depends what species of octopus you're talking about. if its in captivity they live only 1 year but in the wild giant pacific octopuses live 5 to 6 years. but other species live only 6 to 8 months. so if its in captivity its about 1 year.