How do you use 'octopus' in a sentence?
"The marine biologist was looking forward to studying the octopus."
Octopus do not have fins. They swim by using their arms and body. If they need to go very fast, they squirt water out of their siphon and use "jet propulsion." Mostly, an octopus will just crawl around on the bottom to get around. Some Octopus do have ear like appendage's with which the use to propel themselves through the water also. They are also refereed to as Dumbo Octopus.