The rear edge or margin of a moving body such as a fish fin.

Genetically determined characteristic or condition; distinguishing feature.

Allowing light but not detailed images to pass through; semitransparent.

Allowing light to pass through and clear enough that detailed images can be seen.

Crossing from side to side; located or lying across; orientated crosswise. Opposite of longitudinal.

Number of scales in the diagonal row between the orgins of dorsal and anal fins in a fish specimen, excluding the lateral line scales.

In taxonomy, the group ranking below subfamily with a name typically ending in ‘-ini’.

Large filter particularly suitable for outdoor ponds and large aquaria, consisting of a series of vertically-arranged chambers filled with one or more types of media. Water is pumped to the top chamber where it is dispersed, most often using a spray bar. It then percolates down through the other chambers via gravity before being returned […]

Having three points or cusps. Commonly used in reference to teeth of such form.

Having three forks or branches.

Combination of generic name, specific, and subspecific names which together form the name of a subspecies.

The hindmost Weberian ossicle of the Weberian apparatus, touching the anterior wall of the swimbladder and connected to the intercalarium by a dense, elongate ligament.

Arranged in three rows or series.

Obligate dweller of caves or underground environments.

Dwelling underground or in caves.

Used in reference to morphological adaptations to the cave or underground environment such as loss or reduction of pigment or eyes.

Of or relating to feeding and nutrition.

The hierarchical position of an organism within a food chain.

External, umbilical cord-like structure present in members of the family Goodeidae and some other fish groups responsible for transfer of nutrients between an adult female and her internally-developing young. May still be attached to fry at birth.

Of, relating to, or characteristic of, the tropics.