Why do octopus swim backwards?

How many orders of insect have been on postage stamps? How do the legs fit onto there? How much are sea cucumbers worth a day? Does akeelah win in akeelah and the bee? Why do mosquitoes bite tattoo? Why do June beetles disappear in the morning? Are dragonflys smart? Where do ladybirds sleep? What monster drops zorbak's key in aqworlds? What is the evolutionary advantages of flight in insects? How to get rid of worms under your skin? Why do spiders spin their web in corners? Is octopus is vertebrate or non vertebrate? What kind of plants do caterpillars eat? Do squid and octopus and earthworm have multiple hearts? What kind of bug is very tiny black has antenna and stripe neck and rear areas? What kind of symmetry do flatworms have? Can cockroaches survive cold weather? How can you prevent bug stings and bites while swimming? What is the organ which cleans a mollusks hemolymph?