- Scientific name: Faunus ater
- Synonyms: Strombus ater (Linnaeus, 1758), Faunus melanopsis (Montfort, 1810), Melanopsis princeps (Lea, 1837), Pirena terebralis (Lamarck, 1822), Turritella fuscata (Link, 1807)
- Common name: Lava Snail, Devil lava snail, Black Devil Snail
- Group: Freshwater invertebrates
- Habitat: Southeast Asia; India, Sri Lanka, Singapore, Myanmar, Indonesia, Thailand, Malaysia, Philippines, China, New Guinea, northern Australia.
- Size: 5-9 cm
- Biotope: Found in mouths and lower reaches of freshwater streams and rivers with a brackish influence, where they live on the muddy bottom.
- Social behavior: Peaceful, can be kept with other species.
- Diet: Omnivorous; in nature they feed on slit and mud, but they do not work well as algae-eaters. In the aquarium they feed mostly on the substrate.
- Breeding: Not possible in aquarium
- Tank: Minimum 30 litres
- Population: 2-3 shrimp for 30 litres
- Decoration: Use fine sandy substrate with some larger stones.
- Temperature: 23-27 °C
- pH: 7.5-8
- Hardness: 5-20 NK°
- Lifespan: 3-5 years
Description: Lava Snail has a smooth surfaced, thick, dark brown or black colored shell. There is a "Cappuccino”, or "Bicolor" color form, but it might be a totally different species (Faunus sp. Bicolor), where the tip of the shell gradually becomes white. The shell is elongate and comprises of around 20 whorls. The adult shells are often decollate with eroded apical whorls. The aperture is white, ovate and is about one-fifth the length of the shell. The foot is lighter than the body, gray-black colored with light dotted pattern. Adult snails are not so active, they are often hidden, buried in the sand for long periods of time. The Devil lava snail is willing to live in fresh water, however, prefers brackish water. They will not eat aquarium plants. In their natural habitat the population density can reach a few hundreds snails per m2. It is a relative of the well known Malaysian trumpet snail. Black Devil Snail is used as a food source for humans in the Philippines and in Thailand.
Faunus ater males and females cannot be distinguished by external features. In contrast to the Malaysian trumpet snail, Faunus ater is an egglayer, and their larvae can only develop in marine environment, so it is impossible that unwanted spawn occurs in the freshwater tank.
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