Large, pincer-like claw of a crustacean or arachnid, as seen in lobsters, crabs, scorpions, etc..
Glossary: chela
Glossary: chemical filtration
Water filtration method by which dissolved chemicals are removed via use of synthetic adsorbents, ion exchangers, insoluble oxides, zeolite, or activated carbon, these usually being placed within the filter unit or sump.
Glossary: chemoreception
Ability to detect and differentiate chemical stimuli in an environment.
Glossary: chemoreceptor
A sensory nerve cell or sense organ that responds to chemical stimuli such as smell or taste.
Glossary: chevron
A v-shaped line or stripe.
Glossary: chiller
Refrigeration device, normally installed inline with filtration equipment, used to maintain cool conditions in an aquarium. Often used in tandem with a thermostat.
Glossary: Chilonodella
Genus of unicellular, ciliated protozoa; some species are parasites of the skin and gills in freshwater fishes.
Glossary: chimaera
An organism, organ or body part containing genetic tissue of more than one type due to mutation, transplant, genetic engineering, etc.. Also spelled 'chimera'.
Glossary: chironomid
Any member of the Chironomidae, a family of nonbiting midges with larvae normally found in freshwater. The larvae of some species are produced commercially for fish food and commonly referred to as 'bloodworm'.
Glossary: chitin
Nitrogen-containing polysaccharide which forms the principal constituent of arthropod exoskeletons and the cell walls in some fungi.
Glossary: chitinous
Composed of or resembling chitin.
Glossary: chloramine
Any of various compounds containing nitrogen and chlorine, some of which are used as bactericides. Chloramines are often used to purify drinking water because they're more stable than chlorine and produce fewer harmful by-products, but they're considered harmful to fishes.
Glossary: chlorine
Highly irritating, toxic, gaseous element of the halogen group typically used as a disinfectant, bleaching agent and in purification of drinking water. Considered harmful to fishes.
Glossary: chlorophyta
Division of mostly freshwater eukaryotic algae, informally referred to as chlorophytes and containing the true green algae and stoneworts under modern systems of classification. Like higher plants members possess chlorophylls a and b and store food as starch.
Glossary: chloroplast
A chlorophyll-containing plastid found in the cells of green plants and some algae within which photosynthesis occurs.
Glossary: chondrocranium
Primitive, cartilaginous skeletal structure enclosing the brain and inner ear formed in the embryo and usally becoming ossified at a later stage. Retained as cartilage throughout life in some fishes.
Glossary: chromatophore
A pigment-containing or pigment-producing cell that can alter the colour of the skin by expanding or contracting.
Glossary: chromosome
A strand-like structure found in the nucleus of cells that contains DNA and associated proteins. Carries the genes determining heredity.
Glossary: cilia
Plural of cilium.
Glossary: ciliate
Any member of a group of protozoans characterised by possession of cilia.
Product reviewers wanted
Hello! Very much interested in writing for you, please include me in the info. Thank you for the opportunity!
6th Sep 2020
Product reviewers wanted
I would be interested in reviewing products. Before retiring I was a technical writer and managed a Quality Management Program.
30th Aug 2020
Product reviewers wanted
I'm interested and can write reviews from the perspective of someone new to the hobby. I'm only 3-4 months in, but hopefully I can help someone that's...
23rd Aug 2020
Product reviewers wanted
I’m interested in doing this if there is still availability, it sounds like fun! Thanks
19th Aug 2020
Barbodes semifasciolatus – Golden Barb* (Barbus sachsii, Puntius schuberti)
I simply had a question (please forgive if this is not allowed, I read the FAQ but I was not sure). I was wondering if there is any evidence of offsp...
12th Aug 2020