Breeding blue lyretail killifish

Breeding blue lyretail killifish(fundulopanchax gardneri)

Breeding pair of blue lyretail killifish (gold subspecies)

Breeding pair of blue lyretail killifish (gold subspecies)

Equipment needed for breeding blue lyretail killifish

  • 18 inch tank with hood and lights
  • 50w heater stat
  • several growing on tanks with heater and filter
  • floating plants
  • spawning mops made from dark green nylon wool
  • 1 adult male and 1 adult female
  • 1 sponge filter with air pump

Information and general care for blue lyretail killifish(Fundulopanchax gardneri)
The blue lyretail killifish is a beautiful fish that grows to about 2 inches. They have an elongated body. They have a relatively wide mouth. The males have a blue base colour with dark red spots all over the body. There is a yellow fringe on the top edge of the dorsal fin and on the bottom edge of the anal fin. Also the tail fin has a yellow fringe to both the top and bottom of it.

The male also has the lyretail and his fins generally have pointed tips to them. The female has the same colours on the body but much washed out and no yellow. The female has rounded fins.

The blue lyretail is one of the easiest killifish to care for. It is also to breed. It can endure a wide range of ph and hardness but prefers soft water and a slightly acid ph 6.7. The water temperature should be about 75F. Keep a lid with no holes at all. Most killifish are jumpers. They will jump through the smallest hole and onto certain death if no one sees them.

They can be fed on dried food and live food. They aren’t fussy. Feed some live food occasionally if you are thinking of breeding them. They show better colours when they are fed with some live food.

The blue lyretail is not a true annual because it can live for up to 3 years. In the wild, where they live the water doesn’t dry up every year, only occasionally. Their breeding reflects this because the eggs do not have to be stored in peat for several months. They can be just left to hatch after being laid. The eggs can also be stored in peat and hatched several weeks later.

Preparation for breeding blue lyretail killifish

Killifish eggs prefer soft water. If your water is too hard many of the eggs will not get fertilised. So it is a good idea to use soft water for breeding. If your local tap water is too hard then you will have to collect rain water or create soft water with a reverse osmosis unit. Mix the RO water with tap water at 4 parts RO water to 1 part tap water.

Use a bare bottom tank. Do not use plants. Without plants they will spawn entirely on the spawning mops. Make the spawning mops by tying many 6 inch threads of wool together. The mops will sink so attach something like a cork to them. Have many mops made up. Put 4 mops in the aquarium. The rest of the mops have ready to swap over when needed.

Put the male and female in the breeding aquarium. Feed the fish with live food several times a day. Change 25% of the water daily with aged water of the same temperature as the aquarium. The more live food the female eats the more eggs she will lay.

Breeding behaviour of blue lyretail killifish

He will try to get on top of her and press her down. The male will bend his dorsal fin over onto the females back. She will lay some eggs on or in the spawning mop and he will quiver and fertilise them. There may be over 30 eggs per spawning. The eggs are quite large. Remove the spawning mop to another aquarium you have ready. Replace the spawning mop with a fresh one.

They will spawn every day for a few days, perhaps more than a week. Keep removing any spawning mops with eggs on.

Raising the fry of blue lyretail killifish

Put some methylene blue in with the eggs to reduce the number of eggs that get infected. Put the sponge filter in with the eggs. It will take probably about 2 weeks for the first eggs to hatch. But you will get hatchings for a couple of weeks after this as well. So keep alert for this.

The fry when born will be quite large for fry, about 5mm. Cull any defomed fry. They are large enough to eat baby brine shrimp and microworms from the start. Feed several times a day. Do 20% water changes every day. They are hungry fry and grow quite fast. They can become mature within 2 months or less.

As they grow then quickly spread them out to other tanks and keep culling any fry with deformities or that are not symmetrical.

They will be ready to breed again very quickly. It is easy to get overrun with them. So be prepared by having contacts to sell them to or swap of even the local aquarium shop may take some off you in exchange for goods.

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