i never really did snails, but when i was younger i did indeed try sea slugs. I didnt really try to get one, i was on the beach and I found a cool peice of coral on the shore and wanted to dry ir out when i got home. Little did i know that it held a bright red and very fancy sea slug. I constantly changed it's water (natural salt water i got from the beach), got it an airator, and even constantly bought it plants. But it ate all the plants within a day, the airator kept on getting clogged by stray bits of feces, and we were spending a fortune on gas driving to and from the beach to get it fresh water. the answer is, yes, it is very difficult. if you cannot get saltwater from the beach, don't even bother. It is very hard to measure salt that you need to put into the water. If you are an expert of saltwater animals or other pets, you may have a chance. All i had was a preschool teacher mother, an mechanical engineer father, and my books, in which had nothing on taking care of aquatic slugs. you may have a bit more experience with pets than i did, but having someone near you that can make rigs to constantly switch water samples back and forth or fix a clogged up airator helps too.
no
Harder than freshwater ones. If you are a beginner, you definitely are better off starting with a freshwater aquarium.
They are not hard to take care of.:)
by taking good care of them.
fresh water fish
well any animal can be a little bit of a pain and hard to take care of so i would say yes it is hard to take care of.
sometimes they are hard to take care of. i know because i have my own.
Not hard after you get the hang of it!!
Earth worms, snails and grubs also sometimes berries
yes
Yes.
Sea snails do not swim. They slither on the ground just like any other snail you see. Sea snails don't have fins, gills, or anything that help them to swim anyway, so it's impossible for sea snails to swim. I know this because I take care of sea snails in my house.