• Ishimaki Thorn Nerite Snail (Clithon retropictus)
  • Ishimaki Thorn Nerite Snail (Clithon retropictus)

Ishimaki Thorn Nerite Snail (Clithon retropictus)

$ 2.39 $ 3.49

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This rare nerite snail has variable coloration as well as all of the great qualities of other nerite snails.


The Ishimaki Thorn Nerite Snail (Clithon retropictus) is a largely unknown nerite snail that is native to a few coastal countries in Far East Asia.  This peaceful snail has a highly variable range of colors and patterns on its shell and is a very attractive and useful algae-eating scavenger that is great for the nano or planted aquarium.  


Most of the nerite snails we offer have very similar care requirements and characteristics, and the Ishimaki Thorn Nerite Snail is no exception.  It inhabits fresh and brackish water areas and cannot reproduce in freshwater.  This snail is a very effective algae eater and will thrive in a mature aquarium that has plenty of algae and biofilm growth.  Some nerite snails are initially finicky about eating dry foods, but most will come to accept them, especially with foods that are high in spirulina or other plant content.  Fresh vegetables are typically accepted as well.  Nerite snails are hardy in a mature, stable, well-maintained aquarium, but they are not as hardy as some other snail species in subpar setups.  It is important to remember that scavengers such as snails do not consume as much oxygen as most fish, but they still contribute to the bioload of the aquarium and they should not be overstocked long-term.  


What We Like About This Snail:

  • Completely peaceful
  • Many variable, attractive colors and patterns
  • Safe with all plants
  • Excellent scavenger and algae eater
  • Does not reproduce in freshwater



  • Temperature: 72° - 82° F (22° - 28° C)
  • pH: 7.0 – 8.2
  • KH: 2 - 12 dKH
  • Minimum Tank Size: 5 gallons



  • Diet:  Scavenger that feeds continually.  Requires very little feeding in a well-established aquarium containing algae, biofilm, or decaying plant matter.  In less mature aquariums, high quality dry foods with high plant content can be sparingly fed daily.
  • Warning! Avoid any food product, medication, or plant fertilizer that contains Copper of any form. Copper is toxic to invertebrates. Many commercial fish foods, medications, and plant fertilizers contain copper or more commonly copper sulfate. Always look at the ingredient list for any product going into the aquarium to ensure they are copper free.
  • Social Behavior:  Peaceful
  • Origin:  Taiwan, Japan and other Far East Asian countries
  • Average Adult Size: 1 inch (2.5 cm)
  • Average Purchase Size: .5 - 1 inches (1.3 – 2.5 cm)


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