Half Black Guppy Care Guide

half black guppy

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Half Black Guppy Care Guide

Half-black guppies are a popular and attractive variety of guppy fish (Poecilia reticulata). As the name suggests, these guppies have a distinctive color pattern where approximately half of their body is black, while the other half can display various colors, including red, blue, yellow, or any other color characteristic of guppies.

Half-black guppies are often used in breeding programs to develop new color variations and patterns in guppies. Their unique appearance makes them a popular choice for guppy enthusiasts and aquarists.

What is a Half Black Guppy?

The Half Black Guppy is a popular aquarium fish that is known for its distinctive black coloration. Male Half Black Guppies are typically black on the back half of their bodies, while females are usually gray or silver with black spots. Half Black Guppies are a relatively new breed of guppy, and they were first developed in the 1980s.

Half Black Guppy
credit: Fishykart

Appearance and size

Male Half Black Guppies

Male Half Black Guppies are typically larger than females, and they have brighter colors. Their bodies are black on the back half, while the front half is yellow, orange, or red. Male Half Black Guppies also have long, flowing fins.

Female Half Black Guppies

Female Half Black Guppies are typically smaller than males, and they have less intense colors. Their bodies are usually gray or silver with black spots. Female Half Black Guppies also have shorter fins than males.


The Half Black Guppy is a relatively new breed of guppy, and it was first developed in the 1980s. The Half Black Guppy is thought to have originated in Germany, and it was bred by crossing a Black Guppy with a Red Guppy.

Tank Setup

Half Black Guppies are relatively easy to care for, and they can be kept in a variety of tank sizes. However, it is important to provide them with a tank that is at least 10 gallons in size. Half Black Guppies also prefer warm water, so the temperature of the tank should be kept between 72 and 78 degrees Fahrenheit.

Half Black Guppy Tank Setup Checklist

  • Tank size: 10 gallons or larger
  • Water temperature: 72-78 degrees Fahrenheit
  • pH: 6.8-7.8
  • Hardness: 8-12 dGH
  • Filtration: Good quality filter
  • Lighting: Moderate lighting
  • Substrate: Fine gravel or sand
  • Decorations: Plants and rocks


half black guppies
Credit: Tank Facts

Half Black Guppies are easy to breed, and they will often breed in captivity. To breed Half Black Guppies, simply place a male and female in a breeding tank. The female will typically give birth to live fry within 30 days.

Half Black Guppy Breeding Tips

  • Provide the breeding tank with plenty of hiding places for the fry.
  • Feed the fry a high-quality diet.
  • Remove the male from the breeding tank after the female has given birth.


Half Black Guppies are omnivores, and they will eat a variety of foods. However, it is important to feed them a high-quality diet that includes both flakes and live foods. Some good live foods for Half Black Guppies include brine shrimp, bloodworms, and daphnia.

Half Black Guppy Feeding Schedule

  • Feed the adults twice a day, once in the morning and once in the evening.
  • Feed the fry three times a day, once in the morning, once in the afternoon, and once in the evening.


Half Black Guppies are susceptible to a variety of diseases, including ich, velvet, and fin rot. It is important to quarantine new fish for two weeks before adding them to your main tank. It is also important to keep your tank clean and to perform regular water changes.

Common Half Black Guppy Diseases

  • Ich: A parasitic disease that causes white spots on the fish’s body.
  • Velvet: A parasitic disease that causes a gold or brown film on the fish’s body.
  • Fin rot: A bacterial infection that causes the fish’s fins to rot.

Treatment for Common Half Black Guppy Diseases

  • Ich: Treat ich with a copper-based medication.
  • Velvet: Treat velvet with a formalin-based medication.
  • Fin rot: Treat fin rot with a broad-spectrum antibiotic.

Uncommon and Expert Advice

  • Half Black Guppies are more sensitive to changes in water quality than other types of guppies. It is important to perform regular water changes and to use a good quality filter.
  • Half Black Guppies are also more susceptible to stress than other types of guppies. It is important to avoid overfeeding them and to keep their tank clean and free of toxins.
  • If you are planning to breed Half Black Guppies, it is important to select breeding pairs that are of good quality. Male Half Black Guppies should have long, flowing fins and bright colors. Female Half Black Guppies should be plump and healthy.
  • It is also important to provide the breeding tank with plenty of hiding places for the fry. Half Black Guppy fry are very vulnerable to predation, so it is important to provide them with places to hide from larger fish.
  • Finally, it is important to feed the Half Black Guppy fry a high-quality diet. The fry should be fed a variety of foods, including flakes, live foods, and frozen foods.

Best Places to Buy Half Black Guppies

Where you can buy half-black guppies depends on your location and the availability of local fish stores, breeders, or online sources. Here are some options to consider when looking to purchase half-black guppies:

  1. Local Fish Stores (LFS): Check with your local aquarium or fish stores. Many LFSs carry a variety of guppy strains, including half-black guppies. Visit these stores in person to see the fish and ask about their availability.
  2. Online Retailers: Many online retailers specialize in selling aquarium fish, including guppies. Some popular websites to consider include LiveAquaria, Aquabid, and eBay. When buying online, make sure to research the seller’s reputation, read reviews, and understand their shipping policies.
  3. Aquarium Clubs and Forums: Joining local or online aquarium clubs and forums can be a great way to connect with fellow hobbyists and guppy breeders. Members often trade or sell fish within these communities. You can find reputable breeders through these networks.
  4. Breeder Websites: Some guppy breeders have their own websites or social media profiles where they sell their guppies. If you’re looking for specific strains or high-quality guppies, this can be a good option.
  5. Aquatic Expos and Auctions: Look for local aquatic expos, fish club meetings, or auctions where hobbyists may sell or trade guppies and other aquarium fish.

When buying guppies, it’s essential to do your research, ask questions about the fish’s history and care, and make sure the fish appear healthy and well-cared for. Additionally, check that the seller complies with local regulations and has good shipping and handling practices to ensure the safe delivery of the fish to your location.

How much Do Half black guppies cost?

The cost of half-black guppies can vary widely depending on several factors, including their quality, lineage, and the source from which you’re purchasing them. Here are some general price ranges to give you an idea:

  1. Pet Stores: In many pet stores, you can find common guppy varieties at relatively low prices. Half-black guppies may be available for a few dollars per fish.
  2. Online Retailers: When purchasing from online fish retailers or marketplaces, prices can vary. You may find half-black guppies for sale starting at $3 to $5 per fish. The cost may increase for more exotic or high-quality strains.
  3. Aquarium Clubs and Hobbyist Breeders: Prices can be more variable when buying from aquarium clubs, local breeders, or hobbyists. Depending on the quality and lineage, you may pay anywhere from $3 to $20 or more per fish.
  4. Rare Strains and High-Quality Lines: Some breeders specialize in rare guppy strains or high-quality lines. In such cases, the cost per fish can be higher, with prices ranging from $20 to $50 or more per fish.
  5. Auctions and Events: At aquatic expos, auctions, or fish club events, prices can vary greatly depending on the demand for specific strains. You might find good deals or premium fish at competitive prices.

Keep in mind that guppies are generally considered one of the more affordable species in the aquarium hobby. The price you pay will also depend on your location, the availability of certain strains, and whether you’re looking for show-quality fish or just pet-quality guppies.

It’s essential to consider your budget and what you’re looking for in terms of guppy quality and appearance when deciding how much you’re willing to spend. Additionally, factor in the cost of setting up and maintaining a suitable aquarium for your guppies, including equipment, water conditioners, and food.

Half Black Guppies are beautiful and easy-to-care-for fish that make a great addition to any aquarium. By following the tips in this article, you can ensure that your Half Black Guppies live long and healthy lives.

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Lee Johnson

Lee Johnson

Aquarium Enthusiast

I love sharing my knowledge about all things aquarium related. I have been keeping aquariums for over 20 years and cannot imagine a life without an aquarium. 

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