Dumbo Ear Mosaic Guppy Care Guide - Setup, Feeding & Breeding

Dumbo Ear Mosaic Guppies are a striking fancy form of the common guppy, recognised for their unusually large, rounded pectoral fins that extend from the sides of the body like ears. Their tails and bodies display the irregular, net-like mosaic pattern associated with the variety, often highlighted by vivid reds, blues, yellows, oranges or metallic shades. Individual colour expression varies considerably between fish and breeding lines.

Males are smaller and especially ornate, with flowing tails and intense colour, while females are larger and generally more subdued. Despite their elaborate appearance, they remain active, peaceful and inquisitive fish that spend much of their time in the middle and upper levels of the aquarium.

Wild guppies inhabit slow-moving streams, shallow pools, drainage channels and vegetated margins. They are adaptable fish that encounter a range of water conditions in nature, although the fancy Dumbo Ear Mosaic form has been developed through selective aquarium breeding and is less representative of the understated wild fish.

These guppies are social livebearers and make lively inhabitants for peaceful community aquariums. Their constant activity, contrasting colours and unusual pectoral fins make them an appealing choice for both newer aquarists and experienced breeders.

The guppy, Poecilia reticulata, is native to northern South America, including parts of Venezuela, Guyana and northern Brazil, as well as several Caribbean islands such as Trinidad. Dumbo Ear Mosaic is a selectively bred aquarium variety rather than a naturally occurring wild form.

A group of Dumbo Ear Mosaic Guppies should have at least a 40-litre aquarium, with a larger tank preferable for a mixed-sex colony and its developing fry. A footprint of around 60 x 30 cm provides useful swimming length, while a secure lid is advisable because guppies can jump. Use gentle filtration with modest flow, open swimming space and hardy plants such as water sprite, Java moss, guppy grass or floating plants. Fine gravel or sand works well, with smooth decor and dense vegetation providing cover without crowding the upper and middle swimming areas.

Females can reach about 6 cm (2.4 inches), while males usually grow to around 3.5 cm (1.4 inches), excluding any extended fin tissue. Selectively bred lines may vary slightly in adult size.

Feed Dumbo Ear Mosaic Guppies a varied omnivorous diet of quality tropical flakes or small granules, supplemented with blanched vegetables and occasional frozen or live foods such as daphnia, brine shrimp, mosquito larvae and bloodworm. Small portions offered once or twice daily are appropriate, and fry benefit from finely powdered foods or newly hatched baby brine shrimp. A varied diet helps maintain colour, growth and reproductive condition.

Dumbo Ear Mosaic Guppies suit peaceful community aquariums with tankmates such as small tetras, rasboras, peaceful corydoras, kuhli loaches, otocinclus and other calm livebearers. Avoid fin-nipping species, large predatory fish and boisterous tankmates that may harass their flowing fins. Bettas and some gouramis can be unpredictable companions, while shrimp may be vulnerable to predation, particularly their young. Remember that mixed-sex groups produce frequent fry, so single-sex groups or careful male-to-female ratios may be preferable when population growth is not wanted.

Dumbo Ear Mosaic Guppies are prolific livebearers and usually breed readily in a mature aquarium. Keep one male with two or three females to reduce persistent attention, and provide dense plants or a breeding box if you want to protect the fry, as adults may eat newborns. Gestation commonly lasts around four weeks, after which the female releases fully formed free-swimming fry. Feed the young tiny powdered food, crushed flakes or newly hatched baby brine shrimp.

Females are noticeably larger and deeper-bodied, with a rounded abdomen and a small, relatively plain fan-shaped tail. Males are smaller, more colourful and more slender, with enlarged patterned fins and a pointed gonopodium beneath the body instead of the female’s broad anal fin.