Common name: Affinis Chiton
General Information
The Rhyssoplax affinis, commonly known as the Affinis Chiton, is a small marine mollusk belonging to the class Polyplacophora. This species is characterized by its eight armored plates, which provide protection while allowing flexibility. Found in intertidal zones and rocky shores, the Affinis Chiton is a fascinating addition to marine aquariums, especially for hobbyists interested in unique and less common invertebrates.
While not as vibrant as some reef inhabitants, the Affinis Chiton's earthy tones and intricate shell patterns make it an understated yet captivating species. Its role as a grazer and algae cleaner adds functional value to aquariums, making it a practical choice for maintaining a clean and balanced ecosystem.
Details
- Estimated price
- Affordable
- Recommended minimum volume
- 40 liter (11 gallons)
- Salinity
- S.G. 1.023 to 1.025
- Temperature
- 22 to 26 °C (72 to 79 °F)
- Acidity
- pH 8 to 8.5
- Average size
- 5 cm (2″)
- Care level
- Easy Hardy and low-maintenance algae grazer
- Diet
- Herbivore Feeds on algae and biofilm; supplement with algae wafers if needed
- Reefsafe
- Yes
- Aggression
- Peaceful
- Captive bred
- No
Taxonomy
- KingdomAnimalsAnimalia
- PhylumMollusksMollusca
- ClassChitonsPolyplacophora
- OrderChitonsChitonida
- FamilyChitonsChitonidae
- GenusChitonsRhyssoplax Thiele, 1893
- SpeciesAffinis ChitonRhyssoplax affinis (Issel, 1869)
- SynonymsCallistochiton heterodon savignyi Pilsbry, 1893Chiton affinis Issel, 1869Chiton olivaceus affinis Issel, 1869Lepidopleurus bottae Rochebrune, 1882
- Source: GBIF | Global Biodiversity Information Facility
Care
The Affinis Chiton is relatively easy to care for, provided its specific needs are met. It thrives in aquariums with plenty of live rock and algae, which serve as both food and shelter. As a nocturnal species, it is most active during the night, spending the day hidden in crevices or under rocks. This behavior should be considered when designing its habitat.
To ensure its well-being, maintain stable water parameters and avoid introducing predatory species that may harm or stress the chiton. It is also important to provide a mature tank with established algae growth, as this forms the bulk of its diet.
Diet and Feeding
The Affinis Chiton is a herbivore, feeding primarily on algae. In captivity, it will graze on the biofilm and algae naturally growing on rocks and tank surfaces. If algae levels are insufficient, supplemental feeding with algae wafers or sheets can be provided. Ensure that the tank has a steady supply of algae to support its dietary needs.
Behavior and Compatibility
The Affinis Chiton is a peaceful and solitary species, making it an excellent addition to community tanks. It poses no threat to other tank inhabitants and is unlikely to be targeted by most fish or invertebrates, provided they are not aggressive or predatory.
Its slow movement and nocturnal habits make it a low-maintenance species that quietly contributes to the tank's health by controlling algae growth. However, care should be taken to avoid housing it with species that may prey on chitons, such as certain crabs or wrasses.
Health and Common Issues
The Affinis Chiton is a hardy species, but it is sensitive to sudden changes in water parameters. Maintaining stable salinity, pH, and temperature is crucial for its health. Additionally, ensure that the tank is free of copper-based medications, as these are toxic to most invertebrates.
When selecting an Affinis Chiton, look for individuals with intact plates and no visible signs of damage or disease. Providing a stress-free environment with ample hiding spots will help prevent health issues and promote longevity.
Habitat
In the wild, the Affinis Chiton is found in intertidal zones and rocky coastal areas, where it clings to surfaces and grazes on algae. It prefers environments with strong water movement and plenty of crevices for shelter. Replicating these conditions in captivity will help it feel at home and thrive.