Fruit flies are an excellent food for many surface feeding killifish, closely resembling their natural diets in the wild. They are easy to culture, quickly, cheaply and in large numbers. Fruit flys are rarely available in pet shops, but are widely available online, and very much worth trying, even if you don't bother culturing them on an ongoing basis.
What is a fruit fly?
Fruit flies are small flies that live on and around decaying fruit and vegetation. They occur worldwide, except the very coldest regions. The species most familiar to scientists, aquarists and herpetologists are in the genus Drosophila which literally means 'dew-lover' in Greek. Also known as 'bar fly' or 'vinegar fly', these little flies are commonly found around waste bins, bars, orchards etc, and they are widely used in laboratories as research animals. The species we feed to our fish however, have been bred to have shorter 'vestigial' wings, and as such can not fly. These are typically from two species Drosophila melanogaster and Drosophila Hydei.
Why fruit flies?
Although dealing with highly mobile flies can be trickier than with worms, there are some great reasons to consider culturing them.
- Nutritious - all fish can be trained to eat flies, but surface feeders love them. Not only are they relished by the fish, but they also have a high fibre content, and are therefore a great contrast to the fattier foods such as worms and beef heart. They are also typically disease-free, unlike some aquatic livefoods.
- Prolific An adult fly can lay 20+ eggs in a day. Once you get the hang of it, fruit flies are easy to maintain, and at 25 deg. centigrade the development of Drosophila melanogaster takes just 9 days.
- Availability - unlike collected livefoods, cultured Drosophila are available all year round.
- Flightless flies available - fruit flies have been studied in laboratories for very many years, and a lot is known about the humble fruit fly. Over the course of these studies, geneticists line-bred many strains of fly, including vestigial-winged, and even wingless flies. These are the flies typically cultured by hobbiests.
Drosophila larvae in a typical culture
Drosophila larvae climb up the walls of their vials and chrysalise
Drosophila pupae
Drosophila life cycle
Adult flies lay a lot of eggs. A single female can lay over 20 eggs in a day, and can store sperm within her body for up to two weeks, to lay fertilized eggs at will.
Eggs take 23 hours to hatch at 25 deg C. Once they do hatch, the larvae bury into the media and grow. They will stay as larvae for five days, in which time they undergo three moults.
Eventually they will start to climb the sides of the vial, and when fully grown will settle near the top, and form a chrysalis. The change from maggot to fly takes around three days, but again, is temperature dependent.
The image to the right shows a newly formed chrysalis with the lava's segments still visible (1), an older chrysalis with the fly clearly visible. The red dots are its eyes (2) and an empty chrysalis from which a fly will have hatched (3).
Once the flies have emerged they must be moved to new vials, as there is now no food suitable for them in the old vials.
Fruit fly cultures for sale
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Xenia, Ohio, 453**, UNITED STATES OF AMERICA
$28
? LIVE FRUIT FLY CULTURE ?? 2 PACK (HYDEI & MELANOGASTER)
What You??re Buying
You are purchasing a 2-pack of live, actively producing fruit fly cultures, freshly prepared and shipped with care
Each order includes your selected combination of:
?? Golden Hydei
?? Black Hydei
?? Melanogaster
All cultures are professionally mixed with nutrient-rich media and designed for strong, consistent production
??
? Perfect For Feeding:
?? Dart frogs
?? Tree ...
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Dequincy, Louisiana, 706**, UNITED STATES OF AMERICA
$15
Fresh, thriving culture of Drosophila melanogaster (flightless fruit flies) in a 32??oz ventilated cup. Perfect for feeding dart frogs, mantises, small reptiles, fish fry, and other insect??eating pets. Each culture is started with a healthy population and premium media for maximum production
Features:
Species: Drosophila melanogaster (flightless strain)
Container size: 32??oz cup with breathable lid
Media: nutrient??rich formula for sustained fly production
Lifespan: 3??4??weeks...
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Dover, Pennsylvania, 173**, UNITED STATES OF AMERICA
$28
32 oz Drosophila Melanogaster "Turkish Glider" Fruit Fly Culture 3-Pack
Our Fruit Flies are made with Repashy
Turkish Glider Melanogaster are the smallest size of fruit flies at 1 / 16 "
Turkish Glider Melanogaster are a winged and slightly darker than the Golden Wingless Melanogaster
This winged form of melanogaster can 'glide' short distances making for a more active feeder enticing even the pickiest of eaters
Turkish Gliders produce fast and consistently with ...
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Phoenix, Arizona, 850**, UNITED STATES OF AMERICA
$71
FVOAI Fly Trap Indoor, Fruit Fly Catcher Mosquito Killer Insect Trap with Sticky Glue Boards(Black-Blue)HOME DESIGN
WELCOME
TO YOUR PERFECT
HOME
DETAILS
Tips for best results:
1 12 or more hours of running is suggested for an ideal effect
2 Close your windows and shut the doors
3 Put the trap in a dark place for the best trapping of insects
4. Place the trap near the insects-near the fruit, trash can, or plants
Product Specifications:
Power Required: 5WPower ...
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Huntsville, Texas, 773**, UNITED STATES OF AMERICA
$8
Wingless Melanogaster Fruit Flies
These Wingless Melanogaster Fruit Flies are extremely prolific and make an excellent feeder for small reptiles, amphibians, dart frogs, slings, and other tiny insect-eating pets. Their small size and reliable production make them a favorite for keepers who need a steady supply of easy-to-use feeders
Each culture is grown in a 32oz cup with our Super Swarm Media, a premium blend packed with high-quality ingredients to support strong production and healthy ...
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