i just helped my mom set up a tank for guppies at her house this week and there are a bunch of snails with no shells in it. i don't know where they came from, they are too big to have been put in there without noticing. what's in the tank: 2 small guppies, brand new gravel, 2 ornaments that have been dried out for...a year at least? unsure of exact time. and some duckweek. i know snails can seem to come up randomely but these ones are all shell less. so far there are 4 of them, various sizes.
