Phylum — Mollusca.
Class — Gastropoda.
Superfamily — Neritoidea.
Family — Neritidae.
Genus — Neritina.
— Neritina coromandelia [Sowerby, 1832] — Striped Zebra Snail. Family Neritidae. Synonym: Vittina coromandeliana. “Big Line Zebra snail”. Sumatra, Indonesia, Polynesia, Malaysia, Thailand. Shell durable, conical, matte, with a short blunt apex. The last whorl is wide and plump. Dark brown stripes run across the light to dark brown body. The operculum is crescent-shaped, grayish-white to yellow with a red line along the edge, smooth, and visible only when the animal hides inside the shell. Size: length 25 mm, height 23 mm.
The body coloration is yellow-orange with stripes, often intermittent or zigzag, ranging from light to dark brown; the septum is gray and shiny. The head is wide and protrudes significantly from the body. Eyes are located behind long filamentous antennae on short stalks. There are male and female specimens, externally indistinguishable. The feet generally form an elongated oval. The animals breathe through gills, but occasionally leave the water.
It is best to keep them in small groups as they enjoy company. They are not very vulnerable to attacks and can be kept with various species of fish, dwarf shrimp, and other snails. They tirelessly scrape green algae, forage for food from the substrate, and also eat finely chopped fruits, vegetables, and pasta. Initially, wild-caught specimens feed on algae and do not eat artificial food. The larvae migrate to marine waters. Upon returning, they develop into snails. Thus, reproduction in an aquarium is virtually excluded. They live for 4 years or longer. pH 7.0–8.5; gH 10–30°; temperature 22–30°C.
Genus — Neripteron.
— Neripteron auriculata [Lesson, 1830] — Black-footed Snail. Family Neritidae. From Madagascar to the southern Indian Ocean, found in fresh and brackish waters of river estuaries. Due to its large distribution range, it exhibits significant geographical variations in the color and shape of certain parts. 2–3 cm in diameter. Tentacles are filamentous. The shell is partially oval, with two conical protrusions on the sides, a protruding contour on the rear panel, and a rounded apex. It has significant geographical variations differing in shell color and shape. The shell is black on the back, sometimes with dark green or black lines, gray or cream-colored near the aperture. The body is generally gray or brown.
The presence of stones, pieces of mangrove wood, and plenty of live plants in the aquarium will make them feel more comfortable. A peaceful snail that spends most of its time foraging; activity increases at night. Water hardness should be quite high and pH neutral or slightly alkaline. Otherwise, the shell will suffer serious damage.
It tolerates moderate salinity, but can also live completely in freshwater. Water circulation and oxygenation are required. Their diet consists mainly of green algae attached to glass, stones, driftwood, or plants. Brackish water is required for reproduction. Optimum temperature is 25–27°C.
Genus — Septaria.
— Septaria porcellana [Linnaeus, 1758] — Porcelain Septaria Snail. Family Neritidae. “Abalone snail”, “Freshwater snail”. Indonesia, Philippines, Northern Australia, Japan. Length 3–4 cm, width about 2 cm, maximum height 1.2 cm. Unlike the spiral shells of most aquarium snails, here we observe a flat, thin shape with a half-whorl. The surface is smooth, oval-shaped with grayish and whitish coloration, although specimens with yellowish and brownish colors also occur. The body is mostly grown into the shell. The operculum is flat and almost square. Active both day and night.
Completely peaceful, will not bother any other aquarium inhabitants. Can be kept with other snails and fish. Active both day and night. They require an aquarium with water flow from a filter and clean water. This snail moves only along hard surfaces in the aquarium, namely glass, large stones, driftwood, and leaves of fairly tough plants. It feeds exclusively on algae fouling located on glass, tough plants, stones, and wood, and does not touch the substrate or soft surfaces. If the necessary algae for feeding are absent, it dies. It does not eat or damage plants.
They react sensitively to elevated nitrate levels. It is not recommended to try to pry the snail off during rest, as it is capable of strong resistance, and you might tear off the foot and separate it from the shell, thereby killing the snail. A good method is to rotate the snail 180 degrees without pulling it off; the “grip” will noticeably weaken. Breeding in the aquarium has not yet been studied; saltwater is likely required. It lives up to 2 years, but less without green algae. pH 6.5–8.0; dH up to 30; temperature 20–27°C.
Horned Snail, Clithon corona, diadema.
Neritina, Neritina turrita, Neritina natalensis Zebra. 
