I love having a variety ... but if I had to choose just a few, Trochus gets top nods for algae, cerith for general-purpose, and Nassarius for dedicated scavenging. I delight in Stomatellas, but so do my wrasses, so they mostly chill in my sump. Love the limpets (well, they're _like_ a snail!), but rarely see them in the display. Adore the Astraea and the ninja-stars, but worry about their ability to maintain their grips on both the rocks and reality. (Seriously ... how did a creature that can't right itself and _always_ lands upside-down even evolve?!)
~Bruce
~Bruce