Harlequin fish (Trigonostigma Heteromorpha)
Harlequin rasbora Harlequin fish (Trigonostigma Heteromorpha)The Harlequin fish has Trigonostigma Heteromorpha as the genus name and it’s also known as Red Rasbora or Harlequin Rasbora. This species can be found in Asia, in countries like Indonesia or Thailand. It can get to a length of 4.5cm (1.8 inches) and it should be kept in a tank that is at least 30cm (12 inches) long. They should be in water that is a bit acidic or soft, at a temperature between 22 and 25 degrees Celsius (72 to 77F). It will eat worms, insects, crustaceans and dried food.
This fish has been used in aquariums for a long time, with a history of over a century behind him in this capacity. This species is not aggressive and it’s peaceful, great when used in an aquarium with similar fish.
The Harlequins are generally more stocky when compare with other Rasbora fish. You can tell which one is the male by the fact that it’s more slender when compared with the female. The color of the fish is silver, with pink/violet for the back and pink for the sides. The belly is white/silver in color.
The back part of the fish is shaped as a wedge and it’s colored black/blue. This part is less defined in the female than it is for the male, the marking being hazier and it doesn’t go all the way to the belly.
The aquarium should have a minimum of eight Harlequins in it, as they like to shoal. The aquarium should have places where the vegetation is dense, but there should be plenty of space for the fish to swim. The top of the tank is where they prefer to swim.
It’s quite easy for a normal Rasbora to breed in an aquarium, but it’s not the case with the Harlequins. However, when it happens, the two fish will stay upside down, with the tail of the male being curled around the female.
It takes up to 30 hours for the eggs to hatch and another 3-5 days for them to swim freely. The adults should be removed from the aquarium, as they will eat the eggs.