Herper.com Blog
octopus
Advanced marine hobbyists appreciate the challenges and rewards of keeping cephalopods, and vivarium hobbyists may occasionally keep aquatic snails in aquatic environments, but there are a number of other molluscs worth looking at.

Herper.com's mollusc pages:

Slugs and snails:

Cephalopods:

Bivalves:

snail sea slug
Photos: Stock