Tag Archives: fish tank

Live bearing fish in a home aquarium

In several other posts we have looked at fish breeding. We learned about fish that scatter their eggs and fish that hide or anchor their eggs. Fish that harbor their young within their bodies are called livebearers. This group of fish sometimes harbors the eggs in the mouth of the parent and sometimes in the abdomen.

There are about 4 species and a couple of sub-species commonly that are used in a fish tank aquarium. Included in this group are Mouth-breeding Betta, Moffat’s, Gunther’s Cichlid, and Black-chinned Mouthbreeders. In this method of spawning, the female drops her eggs and they are fertilized by the male. Then the eggs are picked back up and kept by one of the parent fish in the mouth until they hatch. The mouth of the parent is not only an incubation chamber, but after the young hatch, a place of safety to dash into in case of danger. Watching the young dash for safety can remind one of people rushing into the New York subway during rush hour.

Many more species of common fish tank fish retain the eggs within their abdomen, and include more than 20 species and several subspecies. Some of the more common to a home aquarium are the Guppy, Molly, Swordtail and Platy. Some of these species will inter-breed in captivity. This knowledge has given amateur and professional breeders a field day in producing many variations in colors and bodies that would not occur in nature.

Animals that retain fertilized eggs within their abdomens are called ovoviviparous. Eggs are produced and then fertilized internally by the male as he swims along beside the female, and the fertilized eggs are carried within the abdomen until they hatch. (This is not the same situation as found in mammals. Mammals not only retain the eggs, but set up a nourishment system from the mother to the young through the placenta. Ovoviviparous species simply retain the eggs and do not provide a maternal nutrition source.). Additionally, in some species the female fish can retain sperm cells for many months and as many as 8 broods have been produced from a single insemination.

As a general rule a well-fed mother will not eat her young. This does not say that other fish in a community tank will not feed on the newborns.

Fries can be produced and survive in a community tank. However, if the expansion of your fish population is your goal, a properly setup breeding tank will give you better results.

Related Posts:

Breeding fish in a home aquarium
Crustaceans and larvae as fish food
Fishing games—a sea of options
Fishing as a pastime for you and your family
More about egg-laying fish

Keep Your Cichlids Healthy – It’s Easy

Guest Post

The hobby of keeping cichlids can be a very enjoyable and rewarding experience. Most people just getting started in keeping these very intelligent aquarium fish have lots of questions. Even as an experienced aquarist, I seem to learn something new everyday. Here are some tips to get you started.

The first thing that you need to do when keeping cichlids is to consider what size that your cichlids will be when they are fully mature. If you have gotten bitten by the Oscar bug and have fallen in love with these very personable fish, you are simply going to need a large tank.

Most people will recommend at least a 55 gallon aquarium to keep a pair of Oscar fish. That is simply the bare minimum for these big guys. If you have a smaller variety, you just need a smaller tank. Simple, right?

Second, ph level and water salinity, among other water chemistry levels, can be very different between the different types of cichlids. Just consider African Cichlids. They are found in different lakes in Africa. Each of these lakes have their own unique water chemistry, so if you are keeping Africans, it is very important to do your research if you are going to replicate their native habitat.

If your cichlids are going to thrive, whether they are African or New World Cichlids, temperature and water chemistry must be monitored.

Plants and cichlids sometimes just do not match well. Many cichlids are very intelligent, but they love to make lettuce out aquarim plants. Its a challenge, but it can be done.

American varieties of cichlids seem to be able to tolerate plants in their aquarium better that Africans do. But having made that point, Oscars love to destroy plant life. Angel fish, on the other hand, seem to tolerate plants very well.

Angel fish can be some of the most enjoyable cichlids in my opinion. They even do very well in community tanks because they are generally docile and tolerate plants very well.

Visit cichlid care to learn how to keep cichlids healthy, colorful and happy. And visit keeping cichlids to learn how to keep your cichlids stress free.