Fruit flies part 1: Introduction to Drosophila

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

Flightless Fruit Fly Culture (Drosophila Hydei)

Catlett, Virginia, 201**, UNITED STATES OF AMERICA

$16

Flightless Fruit Fly Culture (Drosophila Hydei)... more

Flightless Fruit Fly Culture (Drosophila Hydei) No Artificial Mold Inhibitors

San Diego, California, 921**, UNITED STATES OF AMERICA

$12

From Solaxisflauna
You can check our youtube solaxisflauna for more, detailed info on care as well as how to make media

Fresh to a few days old max to ensure no casualties of pupae while shipping. First photo is of fresh culture, second of a producing culture

Thick and dense excelsior increases productivity and moisture regulation. Deep media to ensure culture longevity

No artificial dyes and ingredients-we make these cultures for ourselves for our animals.... more

Flightless Fruit Fly Cultures Freshly Started

Chardon, Ohio, 440**, UNITED STATES OF AMERICA

$19

Shipping Options (Monday through Thursday)
Order must beentered by 12:00pm est to ship same day
Flightless fruit flies (Drosophila hydei) are about ???? and are a great feeder for small lizards, spiders, mantids and frogs. Each culture will arrive with at least 40-50 live fruit flies
These are producing cultures that are about 2 weeks old. They will continue producing new flies for another two to three weeks. These are flightless fruit flies, not wingless
ImportantInfo:
... more

Flightless Fruit Fly 8 PACK cultures Dart Frog Food Reptile Food FREE SHIPPING

Dover, Pennsylvania, 173**, UNITED STATES OF AMERICA

$64

This 8 pack of Flightless Fruit Fly cultures is the perfect addition to any reptile or dart frog owner's collection. These cultures provide a nutritious and tasty food source for your pets without the hassle of dealing with live insects. The flies are easy to maintain and will last for several weeks, ensuring that your pets are well-fed and healthy.
With free shipping included, this is a great deal that you don't want to miss out on. Whether you're a seasoned reptile owner or a new dart frog... more

Sticky Fruit Fly Traps, Yellow Gnat Killer Trap use for Indoor Outdoor, 18 pcs

State College, Pennsylvania, 168**, UNITED STATES OF AMERICA

$10

Sticky Fruit Fly Traps, Yellow Gnat Killer Trap use for Indoor Outdoor, 18 pcs.

Actual picture of my sticky trap after one day conquering a gnat infestation
... more