Ichthyological terms, not general ones.
Type of lake that forms in a rift zone or rift valley and often very deep with steep cliffs around the margins, also known as a rift valley lake, sag pond, or fault-trough lake. The largest freshwater lakes in the world are all of this type. Also used in the aquarium hobby in reference to the Rift Valley lakes of the East African rift.
Used in 32 profiles
Type of connective tissue composed of cells specialised for production and storage of fat globules. The principle means of fat storage in the animal body.
Used in 5 profiles
Loose term used to describe any type of crab useful in an aquarium because it eats algae and/or diatoms. In marine aquaria this would include Sally Lightfoot, Emerald and various species of hermit crab. In freshwater the micro-crab Limnopilos naiyanetri fills the same role.
Type of vivarium containing water. Normally transparent, made of glass, plastic or acrylic and used to display, breed or otherwise maintain ornamental fishes.
Used in 1,715 profiles
Type of confined aquifer containing groundwater under positive pressure.
Not conforming to type; an abnormal specimen.
Used in 1 profile
Type of shutoff valve comprising a free-floating ball with a cylindrical-shaped hole in it that sits in a concave-shaped depression over an opening.
Type of biological filter medium consisting of a plastic ball designed in such a way that the available surface area for bacterial colonisation is maximised. The precise form differs depending on manufacturer.
An organism, organ or body part containing genetic tissue of more than one type due to mutation, transplant, genetic engineering, etc.. Also spelled 'chimera'.
Type of lake formed by accummulation of water in a volvanic crater or caldera.
Used in 7 profiles
Scale type having ctenii on the posterior edge and a consequent rough texture.
Used in 22 profiles
Scale type with morphology intermediate between cycloid and ctenoid, possessing reduced ctenii that are smooth to the touch. Common to certain groups of fishes, e.g., characids.
Used in 3 profiles
Scale type having a smooth margin.
Used in 27 profiles
Purification process, often abbrevaited to DI, by which mineral ions are removed from water, usually via ion exchange over a specialised type of resin. The process does not remove non-ionic molecules thus organic cells such as bacteria tend to remain. Often used in conjunction with reverse osmosis to produce more-or-less pure water which normally requires a degree of remineralisation before being used in aquaria.
The arrangement, type, and number of the teeth in a particular species
Used in 60 profiles
Bone-type ossifying directly from connective tissue membranes and thus lacking a cartilaginous predecessor. Tend to be more numerous in primitive fish forms.
Used in 5 profiles
Used in ichthyology in reference to a written description of a new species, usually in the form of a scientifically-published paper though many have been also appeared in aquarium literature, particularly in the late twentieth century. Also referred to as 'type description' or 'original description'.
Used in 283 profiles
In icthyology, the nomenclatural act by which the type specimen of a previously or newly-established genus, subgenus, species, or subspecies is fixed via an express statement.
Used in 6 profiles
Large group of algae often referred to as 'brown algae' in relation to aquaria. Most are unicellular but there also exist colonial types. Very common component of phytoplankton.
Type of stream or river that branches off and flows away from a main channel. Particularly common in river deltas, but also occur inland in some cases.
Used in 2 profiles