The carnivorous Assassin Snail is a small, freshwater whelk species suited to tropical aquaria. In the wild, it feeds on carrion, worms and other gastropods. This is quite an active snail that will roam in its search for food. When at rest, it usually buries itself into the sandy substrate with just its sensitive proboscis protruding; if food items are detected moving past, the snail quickly stirs into action.