Do water snails breather through gills or.....?

Question

My teachers also cant really find out...I need to know A.S.A.P...Thanks!

Answer 1

Aquatic snails extract oxygen from water using gills, in a way that is similar to what fishes do.

Also, these sites might be useful to you:
http://www.weichtiere.at/english/gastropoda/freshwater.html
http://www.weichtiere.at/english/gastropoda/freshwater2.html

Answer 2

Some water snails just like the Fresh Water Nerites, Mud Snails,and Bithynias breath through their gills. There are many water snails however like Pond Snails, Ram's Horn Snails, Fresh Water Limpets, Bladder Snails that do not breath through their gills. Their gills are reduces, instead leaving to the snail the thin wall of the mantle cavity to assimilate oxygen through. This organ is called the snails' lung.