Zombie Snail - Nassarius snails

"Zombie snails" in a saltwater aquarium context typically refers to Nassarius snails (Nassarius sp.). These snails are known for their scavenging behavior and ability to burrow in the sand, making them beneficial additions to a reef tank cleanup crew. They are often called "zombie snails" because they bury themselves in the sand and then emerge, seemingly from nowhere, when they detect food.