Yellow Mosaic Guppies are a specific color variation of the popular Guppy fish (Poecilia reticulata). Here's some information about them:

1. Appearance: Yellow Mosaic Guppies have a striking yellow coloration with mosaic-like patterns across their body. These patterns can vary from fish to fish but often include spots, speckles, or streaks of other colors such as black, orange, or red. Their fins may also display similar patterns and coloration.

2. Size: Like other Guppies, Yellow Mosaic Guppies are relatively small fish, typically reaching lengths of about 1.5 to 2.5 inches (3.8 to 6.4 cm) when fully grown.

3. Behavior: Yellow Mosaic Guppies are generally peaceful and social fish, making them suitable for community aquariums. However, males may exhibit some territorial behavior, especially when competing for the attention of females.

4. Tank Requirements: Yellow Mosaic Guppies thrive in well-maintained aquariums with a temperature range of 72-82°F (22-28°C) and a pH level between 6.8 and 7.8. They appreciate a planted tank with plenty of hiding spots and open swimming areas. Adequate filtration and regular water changes are essential for maintaining water quality.

5. Diet: Yellow Mosaic Guppies are omnivores and will accept a variety of foods, including flakes, pellets, frozen foods, and live foods such as brine shrimp and bloodworms. Providing a varied diet will help ensure their health and enhance their coloration.

6. Breeding: Like other Guppies, Yellow Mosaic Guppies are prolific breeders and relatively easy to breed in captivity. They are livebearers, meaning females give birth to free-swimming fry instead of laying eggs. Providing hiding spots for fry or separating them from adults is important for their survival.

7. Tankmates: Yellow Mosaic Guppies are compatible with a wide range of peaceful fish species, including tetras, rasboras, mollies, and peaceful dwarf cichlids. Avoid keeping them with aggressive or fin-nipping fish that might harass them.

8. Maintenance: Regular maintenance, including water changes, filter cleaning, and monitoring water parameters, is essential for keeping Yellow Mosaic Guppies healthy. They are relatively hardy fish but still require proper care to thrive.