Of, relating to, or being a bacterium that does retain the crystal violet dye used in Gram's method of staining.

Resembling or consisting of small particles or granules; having a rough texture or structure.

Unconsolidated mixture of rock fragments commonly used as a substrate in aquaria. Also forms the filter medium in undergravel filtration.

Pregnant or egg-bound; carrying eggs or young.

To feed continuously throughout a given period.

Largest and deepest artesian basin in the world, located in Australia and measuring around 1,711,000 square kilometres (661,000 sq mi). It covers most of Queensland, the south-east corner of the Northern Territory, northeastern South Australia, and northern New South Wales.

Term used to describe water with a green-coloured, soupy appearance caused by an excess of phytoplankton in suspension, often as a result of eutrophication. Also known as an algal bloom.

Living together with others of the same kind; sociable.

Vernacular name for the annelid worm Enchytraeus buchholzi (Vejdovsky, 1879), a species commonly cultured by aquarists for use as live fish food. Smaller, more adaptable, and temperature-tolerant than the related white worm, Enchytraeus albidus Henle, 1937.

Water held beneath the Earth's surface. Typically supplies wells and springs.

To grow fishes to a size at which they are marketable or can be passed on to other aquarists.

See guanine.

Crystalline chemical compound giving a metallic, iridescent golden, silvery, white, blue or greenish sheen to the scales of certain fishes. Occurs naturally in some fish species but in others its formation is driven by parasitic infection.

Of, relating to, or located on the throat.

The act or sense of taste.

Of or relating to gustation.

Entire or lower alimentary canal; intestine.

Process by which live prey is raised and fed nutritious foods prior to use, e.g., feeding crickets on dried fish food or fresh vegetables before being offered to the fish.