Nassarius Snails are small but highly effective cleaners for saltwater aquariums, especially those with sand substrates. They scavenge detritus, uneaten food, and organic debris, helping keep your tank clean. Known for their burrowing behavior, they aerate the sand while searching for food, emerging quickly when feeding. These snails are best kept in established tanks with live rock and deep sand beds where they can thrive and maintain aquarium health.