Neutral colors Harlequin rasbora (Trigonostigma heteromorpha)

Harlequin rasbora
Harlequin rasbora (Trigonostigma heteromorpha) fish

Neutral ceramic artwork colors for a Harlequin rasbora (Trigonostigma heteromorpha)

Ceramic artwork colors for a Harlequin rasbora (Trigonostigma heteromorpha)
Ceramic artwork colors for a Harlequin rasbora

Neutral ceramic artwork colors for a Harlequin rasbora (Trigonostigma heteromorpha) fish


Harlequin rasbora or Trigonostigma heteromorpha is a small fish in the Cyprinidae tribe. After its introduction in the early 1900s, the species became an instant favorite among aquarists and is the best known and most widely preserved species among rasboras. In 1935, the image of a trio of harlequin rasboras, stamped in 14k gold, would be embellished with the cover of the first edition of William T. Innes ' classic Exotic Aquarium Fishes and would remain so for all 19 editions.

Harlequin rasbora is a fish that has an approximately lozenge-shaped body, the basal color of which is orange-pink from the head to the caudal peduncle, the exact color of which varies depending on the conditions of the water and the original population from which the fish was born. The posterior half of the body is overlaid with a broad, roughly triangular black marking, which tapers towards the terminal end of the caudal peduncle, and starts approximately below the midpoint of the attachment of the dorsal fin commonly known as the "black wedge."

The dorsal, anal, caudal and pelvic fins are all tinted red, the caudal fin is forked, the red color is concentrated in the outer rays, the inner part of the tail fin being more hyalin.

A fully mature adult harlequin rasbora has a typical length of two inches (5 cm). Males are referred to as having a slightly larger black body patch than females, with the segment adjacent to the anal fin being more rounded in males. Ripe females are noticeably fuller in the outline of the body.

In spite of the relatively uniform water chemistry of its various environments, the harlequin rasbora is an adaptable fish in the aquarium, given that the movement of fish to the waters of different chemical parameters is carried out with due care.

An aquarium intended to house harlequin rasboras should be planted with live plants, with some open swimming areas between plant stands, such as the Cryptocoryne species, which are among the plants inhabiting the native waters of the harlequin rasbora. Several Asian species of Aponogeton may also be used. Bushy plants, such as Cabomba, may also be used in the aquarium, but this plant genus needs intense lighting, while the Cryptocoryne and Aponogeton species prefer more subtle lighting, as does the harlequin rasbora, so if the aquarist wishes to have a variety of plants in the aquarium, other species that prefer subdued lighting are better choices.

Filtration is required to provide moderate currents most of the home watercourses occupied by fish are relatively slow but still provide adequate filtration turnover to maintain aquarium cleanliness.

Feeding the harlequin rasbora poses no problems for the aquarist, as the fish embraces prepared food with enthusiasm, although for the best health, a variety of them should be provided, ideally interspersed with live food, such as Daphnia. In breeding purposes, conditioning with live food is likely to increase success by a considerable margin, but intense live feeding will not contribute to spawning if the water chemistry is wrong. When available, mosquito larvae are an excellent conditioning food for this insect.

The lifespan of the harlequin rasbora has not been systematically determined, but individuals in the aquarium can be expected to live for five to eight years with good care.

References
Trigonostigma heteromorpha (Duncker, 1904) Harlequin rasbora
Harlequin rasbora

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