Guppies Are My Favorite Tropical Fish ~ A speciality hybrid breed of japanese Blue Swordtail guppies.
There are primarily four families of Live-bearing fish. Three of these groups originated in the Americas but some were introduced into Asia and from there spread to almost all tropical and sub-tropical areas including southern Europe. The familiar guppy, molly, platy and swordtail are members of the largest group, the Live-bearing Toothcarps (Poeciliidae). Then there are the Splitfins or Mexican Topminnows (Goodeidae) and the Four-eyed Fish (Anablepidae). The LIve-bearing Halfbeaks (Hemiramphidae) originate from Asia.
The livebearers appeared late in the evolutionary process about 44-38 million years ago during the Oligocene and Miocene periods. They did not originate on all continents, only on the Americas and in Asia. Because they feed on mosquitoes and their larvae, some like the Guppies and Mosquito Fish, were introduced into swampy areas of Southeast Asia and the Philippines to help control malaria mosquitoes. From those locations they spread to just about all tropical and sub-tropical waters, even into southern Europe.These fish have been in the aquarium hobby for a very long time. They were first introduced into Europe in the 1890's and were quite expensive. But these livebearing fish readily reproduced in the aquarium quickly and became very available, so prices soon dropped. Rarer species, however, have only been imported as recently as the 1960's.There are visual clues to identify them, just as there are with other types of fish. While a visual clue to identify a Characin is having an fin, the small fin just behind the dorsal fin, a visual clue to a live bearer is the specialized anal fins of the male livebearer. As the male fish mature, the middle rays of the anal fin are modified into a narrow copulatory organ called a or andropodium, depending on the family.The shape of the gonopodium or andropodium differs among genera and even species. On Live-bearing Toothcarps (Poeciliidae) the gonopodium has a hook or claw on the end and on the Four-eyed Fish (Anablepidae) it is pipe shaped, greatly elongated and fused into a tube. On the Splitfins or Mexican Topminnows (Goodeidae) and the LIve-bearing Halfbeaks (Goodeidae) only part of the fin is modified.Livebearers have an advantage over the egg laying fish. The young can immediately hide from predators from the moment of birth. The young of these fish are born live and almost fully developed, but watch the parents as they will eat their fry. There is also an advantage to breeding them in the aquarium. Because they don't lay eggs, the aquarist doesn't have to be concerned with loosing the hatch due to the eggs succumbing to fungus.
Tropical Fish for Freshwater Aquariums: Lyretail Guppy Livebearers
Are My Tropical Fish: Guppies, Pregnant? | My Aquarium Club
Two of the more popular tropical fish for beginners has to be Guppies and Swordtails. Guppies and Swordtails are livebearers which means that their babies come out swimming. Like most livebearers, there is not much to getting your guppies or swordtails to breed. If you have a male and a female then you will eventually have a pregnant female. The gestation period for livebearers is usually 28 days but can range from 20 to 40 days.Guppy fish are extremely easy to feed. Basic “tropical flakes” can be found at any pet store. BUT SOME brands of fish food are full of “fillers” and not very nutritional for fish. I highly advise buying one of the best brands of food. It will only be a couple dollars more in cost. I highly recommend .