Broad-spectrum antibiotic isolated from the soil bacterium Streptomyces kanamyceticus.

Branch of cytology concerned with cell nuclei, particularly the nature and structure of chromosomes.

Ridgelike structure located on the ventral surface, caudal peduncle or caudal fin base in certain fishes.

SI base unit of thermodynamic temperature, equal in magnitude to the degree Celsius.

Tough, fibrous, insoluble, structural protein forming certain horny structures such as breeding tubercules in some fishes. The principle constituent of hair, nails, horns, and hooves in higher animals.

See Indian almond leaf.

Commonest unit of measurement for carbonate hardness used in aquaria, and an abbreviation of the German term ‘Karbonathärte’. 1 degree KH corresponds to a litre of water containing approximately 17.848 milligrams of calcium carbonate in solution.

Taxonomic rank in the hierarchical classification of living organisms and natural objects. Either the highest rank or rank below domain, depending on the system being followed.

Feeding behaviour in which one organism robs food from another that has previously caught, collected or otherwise prepared it.

Vernacular term for any small, shrimp-like, marine crustacean of the order Euphausiacea. Represent an important, sometimes principal, proportion of the diet of many marine fishes and mammals. Available as food for ornamental fishes, usually in frozen form.