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Lays eggs in fresh water, but the larvae need brackish or sea water, so it won't multiply in your tank.
Full breeding guide, day-by-day plan and simulator →A small spiny ('horned') nerite of coastal fresh and brackish streams. Shell colour and pattern vary a lot (brown, reddish or yellow, striped or dotted) and some individuals lack spines.
French naturalist Constant Récluz described this snail in 1841. Small, colourful and often spiky, it is sold as the crown or diadem nerite.
First described by Constant Récluz in 1841. Named for 'Diadema' means crown, after its shell spines.
14 facts checked with sources
Accepted in MolluscaBase (AphiaID 737508), authority (Récluz, 1841). Brackish/freshwater snail. Trade flag: 'horned nerite' is used for both C. diadema and C. corona (The Shrimp Farm; Aquatic Arts sells 'Clithon corona/diadema'), and shells are polymorphic, so shop labels are often unreliable.
MolluscaBase via WoRMS REST record: Clithon diadema (AphiaID 737508) · Wikipedia: Clithon diadema (cites MolluscaBase; Ng et al. 2016)Legacy had no family.
MolluscaBase via WoRMS REST record: Clithon diadema (AphiaID 737508) · Wikipedia: Clithon diadema (cites MolluscaBase; Ng et al. 2016)Shell size. The Shrimp Farm (C. corona & C. diadema together) gives ~1 in (2.5 cm); Aqualibs gives 1.3-2 cm. Larger figure used per size rule; legacy 2 cm is within the spread.
The Shrimp Farm (hobby care guide): Horned nerite snail, Clithon corona & C. diadema (2022) · Aqualibs (hobby profile): Clithon diadema (Black Gold Antler Snail), 2026Legacy 7-8.5 ~ The Shrimp Farm 7-8.4 (rounding).
The Shrimp Farm (hobby care guide): Horned nerite snail, Clithon corona & C. diadema (2022) · Aqualibs (hobby profile): Clithon diadema (Black Gold Antler Snail), 2026Legacy had none. GH from one hobby source; The Shrimp Farm gives KH 8-12.
Aqualibs (hobby profile): Clithon diadema (Black Gold Antler Snail), 2026 · The Shrimp Farm (hobby care guide): Horned nerite snail, Clithon corona & C. diadema (2022)5 US gal = 18.9 L, ~ legacy 20 L.
The Shrimp Farm (hobby care guide): Horned nerite snail, Clithon corona & C. diadema (2022)Legacy care 2 (medium); The Shrimp Farm rates it Easy but sensitive just after purchase, to copper and to excess CO2.
The Shrimp Farm (hobby care guide): Horned nerite snail, Clithon corona & C. diadema (2022)Legacy had no range. Exact range is muddled by confusion with C. corona; Fukumori's work on amphidromous Indo-West Pacific neritids is the primary reference (not fetched).
The Shrimp Farm (hobby care guide): Horned nerite snail, Clithon corona & C. diadema (2022) · MolluscaBase via WoRMS REST record: Clithon diadema (AphiaID 737508)Needs brackish water for larvae.
The Shrimp Farm (hobby care guide): Horned nerite snail, Clithon corona & C. diadema (2022)Legacy 'orange and dark pattern... brackish and freshwater near rivers' is broadly right; added that pattern varies and that it is usually spiny.
The Shrimp Farm (hobby care guide): Horned nerite snail, Clithon corona & C. diadema (2022)