The HB (Half Black) Mosaic Guppy is another popular variety of guppy known for its unique and attractive coloration. Here are its key features:

1. Coloration: This guppy is characterized by a half-black body, typically from the midsection to the tail. The front part of the body usually features vibrant colors, including shades of red, blue, or green. The "mosaic" aspect refers to the intricate, multicolored patterns found on the fins and tail.

2. Fins and Tail: The fins, particularly the caudal (tail) fin, often exhibit a mosaic pattern with a mix of colors and shapes, contributing to its striking appearance. The dorsal fin may also display similar patterns.

3. Size: Like other guppies, HB Mosaic Guppies are small, generally reaching about 1.5 to 2 inches in length.

4. Body Shape: They have the typical streamlined, sleek body shape of guppies, with a slightly curved back.

5. Lifespan: With proper care, they usually live for 1 to 2 years.

6. Behavior: They are active, social fish that enjoy swimming in groups and are generally peaceful, making them suitable for community tanks.

7. Breeding: As livebearers, they give birth to live young. HB Mosaic Guppies are relatively easy to breed in captivity.

8. Care Requirements: They thrive in well-maintained freshwater tanks with stable water parameters. They prefer a temperature range of 72-82°F (22-28°C) and a pH level of 6.8-7.8. 

These features make the HB Mosaic Guppy a favorite among aquarium enthusiasts for its beauty and dynamic presence in tanks.