not sure on those. i just know of the apple snail. we have someone here at work that cultures them for a everglades renourishment project. The apples have a good size to them and produce a ton of babies. you just have to raise them up. it would be a fun project! mollusk are what i mainly work with.

here is a little tip on figure out set ups, food requirements and such. do a google scholar search on apple snail culture. im pretty sure you can find some information on culturing them. i know a little about the set up but not enough to tell you what to feed the babies and how to keep them from getting sucked down the drain. they are direct developers so they don't have a planktonic larvae.

good luck and post pics if you do this!!