Endler's Livebearer (Poecilia wingei), often referred to simply as Endler's, is a small and colorful freshwater fish that's closely related to the Guppy (Poecilia reticulata). Here's some information about the Endler's Livebearer, including the "Endler's Blue" variety:

1. Appearance: Endler's Livebearers are known for their vibrant and varied coloration. The "Endler's Blue" variety typically displays shades of blue, green, and sometimes hints of red or orange. They have a slender body and a slightly pointed tail fin. Their fins may also have intricate patterns and coloration, adding to their beauty.

2. Size: Endler's Livebearers are small fish, usually reaching lengths of about 1 to 1.5 inches (2.5 to 3.8 cm) when fully grown.

3. Behavior: Endler's Livebearers are peaceful and social fish, making them excellent community tank inhabitants. They are active swimmers and enjoy exploring their surroundings. They can be kept in groups without significant aggression issues.

4. Tank Requirements: Endler's Livebearers are adaptable fish that can thrive in a variety of tank setups. They prefer a temperature range of 72-82°F (22-28°C) and a pH level between 6.5 and 8.0. A well-planted aquarium with plenty of hiding spots and open swimming areas is ideal for them. They appreciate water with good quality and regular maintenance.

5. Diet: Endler's Livebearers are omnivores and will accept a wide range of foods, including high-quality flakes, pellets, frozen foods, and live foods such as brine shrimp and bloodworms. Providing a varied diet will help maintain their health and coloration.

6. Breeding: Endler's Livebearers are prolific breeders, similar to Guppies. They are livebearers, meaning females give birth to free-swimming fry instead of laying eggs. Breeding them in captivity is relatively easy, and they can produce offspring regularly.

7. Tankmates: Endler's Livebearers are peaceful and can be kept with other peaceful fish species that share similar water parameter requirements. However, it's best to avoid keeping them with larger or aggressive fish that may prey on them or compete for resources.

8. Maintenance: Regular water changes, proper filtration, and monitoring water parameters are essential for keeping Endler's Livebearers healthy. They are relatively hardy fish but still require proper care to thrive.