Octopus is commonly known as the devil fish. There is no species of that name "Devilfish Octopus". But octopuses have a large variety in sizes as well in species. here is a website with a list of species and their sizes.
an octopus is not a devilfish
No, the devilfish in "Island of the Blue Dolphins" is not an octopus. It refers to a large manta ray that the main character encounters and hunts in the book.
A devilfish octopus eats crabs and other things.
Yes, they are just like octopus with long arms.
Dolphin, darters, devilfish (octopus), dogfish (small sharks), etc.
Because in ancient times they thought the octopus was a monster called krakken.
A devilfish, also known as a manta ray, typically has two arms or fins that extend from its body. These fins are used for maneuvering in the water and are not considered true arms.
David Devilfish Ulliott goes by The Devilfish.
big.
It would have to be a BIG octopus (they do get big but probably not big enough). A giant squid, maybe...
if the octopus is big yes but, if it is small no
The huge manta ray is often called devilfish.