Hot! Werner’s Killifish(ඉරි හඳයා)

Werner’s Killifish (Aplocheilus werneri) is Endemic to Sri Lanka. Relatively unfussy. Although it is naturally a predator it will usually accept live, frozen or dried foods in captivity.Males are more brightly coloured, have longer fins and grow larger than females.

Quite easily bred. It’s an egg scattering species. There exists several methods of spawning it and much is down to personal preference. Here is described the most common of these.

A spawning tank should be set up containing soft, slightly acidic water of pH 6.5, temerature 78°F. Slight deviation from these parameters is acceptable. The spawning aquarium should be brightly lit with floating plants for cover and large amounts of spawning medium in the form of fine-leaved plants such as java moss or nylon spawning mops. No substrate is necessary and gentle filtration via a small air-driven sponge filter is sufficient. The fish should be conditioned in a separate aquarium with lots of live food before a trio comprising 1 male and 2 females is selected and placed in the spawning tank. Spawning should occur the following morning.

The fish will spawn daily, depositing 10-30 eggs every 24 hours for around 2 weeks and these should be removed gently as they are noticed. Each trio should only be allowed to spawn for a week or so before being returned to the conditioning tank, as the spawning process is hard on the fish (particularly the females) and they can become fatigued and weak if left for too long.

The eggs should be transferred daily to a small aquarium containing water from the spawning tank to a depth of 1-2 inches to which has been added 1-3 drops of methylene blue, depending on volume. This container should be checked daily for fungussed eggs, which should be removed with a pipette. The eggs will hatch in 11-14 days depending on temperature.

The fry are large enough to take newly hatched brine shrimp as soon as their yolk sacs have been used up. They will also accept microworm from around the third day. They should be watched closely and separated as they grow as larger fry will prey on their smaller siblings.

Unlike many other killifish species, it is usually found in bodies of permanent water and is not an annual species. This species is not seen often in the hobby. It was originally considered a subspecies of Aplocheilus dayi and is still sometimes referred to using the incorrect name Aplocheilus dayi werneri.

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