3 Live Vampire Shrimp (Atya gabonensi) - 1 to 2 inches long - Grows to 6 inches or more! + Java Moss by Aquatic Arts&trade; All InvertObsession brand plants and animals (sold by Aquatic Arts) come with a 100% live arrival guarantee, plus free email support directly from the owners! Vampire Shrimp are living aquarium filters - they use feather-like claspers to feed by filtering particles in the water These shrimp are able to change colors, and they will range from a deep, silvery blue to a russet brown. Similar to Singapore Flower Shrimp in the way that they are extremely peaceful and filter water particles. However, these shrimp grow larger than Singapore Flower Shrimp. These are MUCH larger than dwarf shrimp, growing to a maximum size of 5 to 6 inches.