{"product_id":"green-urchin-nerite-snail-clithon-donovani","title":"Green Urchin Nerite Snail (Clithon donovani)","description":"\u003cbody\u003e\n\n\n  \n\u003cmeta name=\"viewport\" content=\"width=device-width,initial-scale=1.0\"\u003e\n  \u003ctitle\u003eGreen Urchin Snail - Superior Shrimp and Aquatics\u003c\/title\u003e\n  \u003clink href=\"https:\/\/fonts.googleapis.com\/css2?family=Playfair+Display:wght@400;600;700\u0026amp;family=DM+Sans:wght@300;400;500\u0026amp;display=swap\" rel=\"stylesheet\"\u003e\n  \u003cstyle\u003e\n\n    .ssa-pd *, .ssa-pd *::before, .ssa-pd *::after { box-sizing: border-box; }\n    @keyframes fadeUp { from { opacity: 0; transform: translateY(16px); } to { opacity: 1; transform: translateY(0); } }\n    .ssa-pd { font-family: 'DM Sans', sans-serif !important; color: #1e1a1a !important; background: #fff !important; line-height: 1.75 !important; }\n    .ssa-pd .hero { background: linear-gradient(150deg, #111111 0%, #2a0000 60%, #F40909 100%) !important; 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}\n    .ssa-pd .policy-bar a:hover { background:#F40909 !important; }\n  \n  \u003c\/style\u003e\n\n\n\u003cdiv class=\"ssa-pd\"\u003e\n  \u003cdiv class=\"hero\"\u003e\n    \u003cstyle\u003e.ssa-pd .hero::before{content:\"\u0026#128012;\";}\u003c\/style\u003e\n    \u003cspan class=\"hero-tag\"\u003eFreshwater Snails\u003c\/span\u003e\n    \u003ch1\u003eGreen Urchin Snail\u003c\/h1\u003e\n    \u003cp class=\"hero-sub\"\u003eA spined Nerite with an olive to deep green shell studded with protruding spines, giving it a distinctly urchin-like silhouette. A hardworking algae grazer with a look unlike any other snail in the hobby.\u003c\/p\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"feature-pills\"\u003e\n    \u003cspan class=\"fpill\"\u003e\u003cspan class=\"dot\"\u003e\u003c\/span\u003e Olive to Deep Green Shell\u003c\/span\u003e\n    \u003cspan class=\"fpill\"\u003e\u003cspan class=\"dot\"\u003e\u003c\/span\u003e Protruding Urchin-Like Spines\u003c\/span\u003e\n    \u003cspan class=\"fpill\"\u003e\u003cspan class=\"dot\"\u003e\u003c\/span\u003e Clithon \/ Neritina sp.\u003c\/span\u003e\n    \u003cspan class=\"fpill\"\u003e\u003cspan class=\"dot\"\u003e\u003c\/span\u003e Cannot Breed in Freshwater\u003c\/span\u003e\n    \u003cspan class=\"fpill\"\u003e\u003cspan class=\"dot\"\u003e\u003c\/span\u003e Continuous Algae Grazer\u003c\/span\u003e\n    \u003cspan class=\"fpill\"\u003e\u003cspan class=\"dot\"\u003e\u003c\/span\u003e Shrimp Safe\u003c\/span\u003e\n  \u003c\/div\u003e\n  \u003cdiv class=\"body-wrap\"\u003e\u003cdiv class=\"prose\"\u003e\n    \u003cp\u003e\u003cstrong\u003eGreen Urchin Snails\u003c\/strong\u003e are a spined Nerite variant with an olive to deep green shell studded with protruding spines that give the snail a distinctly urchin-like silhouette. The green base colouration is more subdued and naturalistic than the bold banding of the Tricolor Horn or Zebra Nerite, letting the spine structure carry the visual interest instead. In a planted tank the green shell integrates with the surrounding plant colour while the spines catch the eye at close range, producing an effect that reads as naturalistic from a distance and genuinely unusual up close. Like all Nerites they are continuous, effective algae grazers that cannot breed in freshwater, keeping population permanently fixed. Small, low bioload, and completely safe with all shrimp. Spines are brittle and break easily, which is normal and harmless.\u003c\/p\u003e\n\n    \n    \u003cspan class=\"section-label\"\u003eAppearance\u003c\/span\u003e\n    \u003ch2\u003eGreen Shell, Urchin Spines\u003c\/h2\u003e\n    \u003cdiv class=\"bullet-list\"\u003e\n      \u003cspan class=\"bl-item\"\u003e\u003cstrong\u003eOlive to deep green shell base with a naturalistic, subdued tone.\u003c\/strong\u003e Unlike the high-contrast banding of Zebra, Tiger, or Tricolor Nerites, the Green Urchin Snail has a relatively uniform green shell that reads as earthy and understated. This makes it particularly well-suited to naturalistic planted aquascapes where a boldly patterned snail would read as an accent element rather than part of the environment.\u003c\/span\u003e\n      \u003cspan class=\"bl-item\"\u003e\u003cstrong\u003eProtruding spines distributed across the shell giving an urchin-like profile.\u003c\/strong\u003e The spines are calcified extensions of the shell and are the species' defining structural feature. They vary in length and distribution between individuals. Like all spined Nerites the spines are brittle and break readily during normal activity or handling. Broken spines are harmless and do not regrow.\u003c\/span\u003e\n      \u003cspan class=\"bl-item\"\u003e\u003cstrong\u003eSmall size with correspondingly low bioload.\u003c\/strong\u003e Green Urchin Snails stay compact, making them appropriate for nano tanks and adding minimal waste to a carefully managed shrimp setup.\u003c\/span\u003e\n    \u003c\/div\u003e\n    \u003cspan class=\"section-label\"\u003eCare\u003c\/span\u003e\n    \u003ch2\u003eGrazing \u0026amp; Requirements\u003c\/h2\u003e\n    \u003cdiv class=\"bullet-list\"\u003e\n      \u003cspan class=\"bl-item\"\u003e\u003cstrong\u003eContinuous algae grazer across glass, hardscape, and plant surfaces.\u003c\/strong\u003e Consumes green film algae, brown diatom films, and biofilm thoroughly and continuously. Will not damage healthy plants or mosses.\u003c\/span\u003e\n      \u003cspan class=\"bl-item\"\u003e\u003cstrong\u003eCannot breed in freshwater, so population is permanently fixed.\u003c\/strong\u003e White egg capsules may appear on hard surfaces but will not hatch without brackish water. No population management required.\u003c\/span\u003e\n      \u003cspan class=\"bl-item\"\u003e\u003cstrong\u003epH 6.5 to 8.0, GH 6 to 12, temperature 70 to 80°F.\u003c\/strong\u003e Alkaline water protects the shell and spine structure. Acidic water causes progressive erosion of both. Standard Neocaridina parameters are ideal. Not recommended for low-pH Caridina setups.\u003c\/span\u003e\n      \u003cspan class=\"bl-item\"\u003e\u003cstrong\u003eSupplement feeding if stocked in numbers or in a low-algae tank.\u003c\/strong\u003e Algae wafers, spirulina discs, and blanched vegetables ensure adequate nutrition when natural algae is insufficient. Do not overstock relative to available algae.\u003c\/span\u003e\n      \u003cspan class=\"bl-item\"\u003e\u003cstrong\u003eCover the tank. Nerites climb and will exit through any gap.\u003c\/strong\u003e Keep the water line well below the rim or use a fitted lid.\u003c\/span\u003e\n      \u003cspan class=\"bl-item\"\u003e\u003cstrong\u003eFully safe with all shrimp and highly sensitive to copper.\u003c\/strong\u003e Compatible with all \u003ca href=\"\/es\/collections\/neocaridina-shrimp-parent\" title=\"Neocaridina shrimp | colorful freshwater clean-up crew – superior shrimp \u0026amp; aquatics\" aria-label=\"Neocaridina shrimp | colorful freshwater clean-up crew – superior shrimp \u0026amp; aquatics\"\u003eNeocaridina\u003c\/a\u003e and \u003ca href=\"\/es\/collections\/caridina-shrimp-parent\" title=\"Caridina shrimp | vibrant freshwater shrimp for aquariums – superior shrimp \u0026amp; aquatics\" aria-label=\"Caridina shrimp | vibrant freshwater shrimp for aquariums – superior shrimp \u0026amp; aquatics\"\u003eCaridina\u003c\/a\u003e shrimp. Avoid all copper-containing medications and fertilisers.\u003c\/span\u003e\n    \u003c\/div\u003e\n    \u003cdiv class=\"tip-box\"\u003e\n\u003cspan class=\"tip-label\"\u003eKeeper's Note\u003c\/span\u003e\u003cp\u003eThe Green Urchin Snail is the choice for aquarists who want the visual novelty of a spined Nerite without the bold colour contrast that pulls attention away from the rest of the tank. The green shell disappears into a planted aquascape at viewing distance while the spine structure rewards close inspection. In a shrimp tank where the shrimp are meant to be the focus, this is the spined Nerite that contributes cleaning value and quiet interest without competing visually.\u003c\/p\u003e\n\u003c\/div\u003e\n    \u003ca href=\"\/es\/collections\/freshwater-snails-parent\" class=\"cta-block\" title=\"Freshwater snails | algae-eating clean-up crew for your tank – superior shrimp \u0026amp; aquatics\" aria-label=\"Freshwater snails | algae-eating clean-up crew for your tank – superior shrimp \u0026amp; aquatics\"\u003e\u003cspan class=\"cta-icon\"\u003e🐌\u003c\/span\u003e\u003cdiv class=\"cta-text\"\u003e\n\u003cstrong\u003eBrowse more freshwater snails\u003c\/strong\u003e\u003cp\u003eExplore our full Nerite selection and more. Browse our \u003cspan style=\"color:#F40909;font-weight:500;\"\u003eFreshwater Snails collection\u003c\/span\u003e.\u003c\/p\u003e\n\u003c\/div\u003e\n\u003cspan style=\"color:rgba(255,255,255,0.4);font-size:1.4rem;\"\u003e→\u003c\/span\u003e\u003c\/a\u003e\n    \u003cdiv class=\"policy-bar\"\u003e\n      \u003cspan\u003eBefore placing your order, please review our\u003c\/span\u003e\n      \u003ca href=\"\/es\/pages\/doa-policy\" title=\"Live arrival guarantee | superior shrimp \u0026amp; aquatics\" aria-label=\"Live arrival guarantee | superior shrimp \u0026amp; aquatics\"\u003eDOA Policy\u003c\/a\u003e\n      \u003ca href=\"\/es\/pages\/shipping-info-practices\" title=\"Shipping policies, info \u0026amp; practices – superior shrimp \u0026amp; aquatics\" aria-label=\"Shipping policies, info \u0026amp; practices – superior shrimp \u0026amp; aquatics\"\u003eShipping Info\u003c\/a\u003e\n    \u003c\/div\u003e\n  \u003c\/div\u003e\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/body\u003e","brand":"Superior Shrimp \u0026 Aquatics","offers":[{"title":"Default Title","offer_id":45166949302480,"sku":null,"price":5.0,"currency_code":"USD","in_stock":true}],"thumbnail_url":"\/\/cdn.shopify.com\/s\/files\/1\/0639\/2895\/9184\/files\/green-urchin-nerite-snail-clithon-donovani-snails-cluster-spotted-905.webp?v=1789232778","url":"https:\/\/www.superiorshrimpaquatics.com\/es\/products\/green-urchin-nerite-snail-clithon-donovani","provider":"Superior Shrimp \u0026 Aquatics","version":"1.0","type":"link"}