The evolutionary development and history of a species or other taxonomic group. May be based on morphology, molecular data, or both.

The study of the relationships between organisms and their geographical location.

Taxonomic rank below kingdom and above class.

Feeding on plants.

The photosynthesizing constituent of a planktonic community, consisting of algae, cyanobacteria and other microorganisms.

Tiny aquarium of arguable definition, but generally considered to have a volume between 2.5-5 US gallons (2.08-4.16 UK gallons; 9.46-18.93 litres). Also known as a pico tank.

See pico aquarium.

Substance producing a characteristic color in plant or animal tissue.

Colouration formed by deposition of pigments in tissues or cells.

Resembling a feather; feather-like.

Breeding and rearing of fish under controlled conditions.

Fish-shaped.

Of, relating to, or characteristic of a fish or fishes.

An organism that feeds on fishes.

Feeding on fishes.

Tooth-shaped scale-type found in certain fishes, e.g., sharks, rays. Structurally homologous with vertebrate teeth.

Generic term applied to numerous non-parasitic flatworms of the class Turbellaria. Also a genus within that class, Planaria. Various species occur in aquaria where they’re most often associated with accumulation of uneaten food or organic material and normally considered pests.

An organism that feeds on plankton.

Feeding on plankton.

Any organism, or more typically, collection of organisms drifting freely in a body of water. Used in reference to both microscopic, e.g. algae, fish larvae, and larger, e.g. jellyfish, organisms.