First of all, the plural of octopus is, "octopi." They have neither fins or tails, rather eight arms to help them move about.
No, they use their tails.
yes
no they have fins and tails but no legs or arms :)
Their arms, legs, tails,wings or fins.
Well, the octopus had ink glands like the squid, and if it had fins then not only would it look ridiculous, they couldn't get away from predators. Also, on a octopuses tentacles, there are suction cups. They can't get them on fins, and they work as hands. I think octopuses and tenctacles get along, not fins. Don't you?
No, shrimp do not sting. Look at their tails; they are fins, not stingers.
fins, tails, and any other appendages really.
Whales swim using their fins and tails.
They are slippery, they have big lips, the have tails, scales, fins.
they are born with them if they don't have them then they are going to die :(
fins, gills, and tails
When you tap on the glass of the tank, they feel it. Hope this helps!