A curve, bend or loop along the course of a river or stream.

Type of filtration that physically removes solid particles and objects from the water.

Relating to, situated on or in, or extending towards the middle; median. Opposite of lateral.

See medial.

Any of various black, dark brown, reddish-brown, or yellow pigments found in animal or plants.

Abnormal extent of dark colouration in the skin, scales, hair, fur, or feathers characterised by excessive depositis of melanin. Can be considered the opposite of albinism.

Pigment cell containing melanin.

Thin, usually flexible layer of tissue covering, lining, separating, or connecting cells or parts of an organism.

Relating to, composed of or similar to a membrane.

Curve caused by surface tension visible in the upper surface of a liquid close to the side of a container or other object. My be concave or convex in shape depending on the liquid and surface involved.

Of, relating to, or located on the chin.

Barbel located on the chin.

Having a number of parts, or divided into repeated, countable features; segmented; of or related to such characters.

A countable trait, e.g., the number of rays in a fin, gill rakers, lateral line scales, etc..

In ichthyology, the counting of quantitative characters, such as the number of fins, fin rays or scales.

Skull bone separating the nasal cavities.

Of, in, or orientated towards the middle line of a body.

Prefix meaning middle or mid.

Paired bone situated in the pectoral girdle, below the cleithrum.

Interval of geological time covering the period from around 250 million years ago to 65 million years ago. Often referred to as the ‘Age of Reptiles’ because dinosaurs were the dominant terrestrial and marine vertebrates.