Ichthyological terms, not general ones.
Current and most recent of the three Phanerozoic geological eras, immediately following the Mesozoic Era and covering the period from 65.5 mya to the present. Also known as the 'Age of Mammals' due to the great diversification occurring among that group, it's divided into three periods: Paleogene, Neogene, and Quaternary; and seven epochs: Paleocene, Eocene, Oligocene, Miocene, Pliocene, Pleistocene, and Holocene.
Used in 8 profiles
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.
An organism, organ or body part containing genetic tissue of more than one type due to mutation, transplant, genetic engineering, etc.. Also spelled 'chimera'.
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'.
Used in 342 profiles
Nitrogen-containing polysaccharide which forms the principal constituent of arthropod exoskeletons and the cell walls in some fungi.
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.
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.
A pigment-containing or pigment-producing cell that can alter the colour of the skin by expanding or contracting.
Used in 12 profiles
Taxonomical method used to classify species of organisms into clades, each of which contains an ancestor organism and all its descendants, based on synapomorphies (shared derived characters). Cladistic classifications are usually presented in the form of a cladogram.
Specimen descended from and genetically identical to a single common ancestor with natural examples normally resulting from asexual reproductive events. Produced via parthenogenesis in some fishes.
Point or zone at which the land meets the sea or other large water body.
Used in 75 profiles
Disease symptom resulting from infection by the bacterium Flavobacterium columnare which is ubiquitous in freshwater environments. Often mistaken for a fungal infection due to its appearance and is referred to variously as mouth rot, mouth fungus, fin rot, gill fungus, body fungus, saddleback columnaris, and cotton wool disease. Highly contagious and usually fatal unless treated with antibiotics or other.
Used in 1 profile
Simultaneous demand by two or more organisms for a limited resource such as food, light or living space.
Used in 16 profiles
A scientific name that has specific nomenclatural protection under the ICZN code, specifically a name that is otherwise unavailable or invalid but has been made available as a valid name by removal of the obstacles blocking its use.
Dermal, bony growth or spicule normally protruding from one or more fin rays or scale margins. Present on parts of the body or fins that come into contact with the female during spawning in males of some fishes.
Used in 9 profiles
Refers to bodies of water containing high levels of nutrients. Opposite of oligotrophic.
Disease of freshwater fishes caused by species of parasitic flagellate protozoa from the genus Ichthyobodo and more accurately referred to as ichthyobodiosis. It attacks the gills, fins and skin with symptoms including an increase body mucus secretion giving rise to the vernacular term 'skin slime disease'. Can be treated using proprietary products but frequently fatal otherwise.
Term formerly used in zoological taxonomy and equivalent to the modern terms syntype and paratype but no longer valid according to the ICZN code.
Form of camouflage in which an organism possesses darker pigmentation on the parts of the body exposed to light and paler on those normally shaded. Many fishes are coloured darker dorsally and lighter ventrally for this purpose.
Used in 4 profiles
Bony or fleshy ridge on the head or certain parts of the body, e.g., the caudal peduncle.
Used in 40 profiles