The description "sky blue with a pink tail" is indicative of a selectively bred color variant of the common guppy (Poecilia reticulata). Guppies are popular freshwater aquarium fish known for their vibrant colors, and they come in various color morphs and patterns.

Here's some information about guppies and the color description you provided:

Guppy (Poecilia reticulata):

1. Coloration: Guppies are available in a wide array of colors, and there are numerous selectively bred strains and varieties. The description "sky blue with a pink tail" suggests a guppy with a blue body color and a tail (caudal fin) that exhibits a pink hue.

2. Size: Guppies are small fish, typically growing to about 1.5 to 2.5 inches (4 to 6 cm) in length.

3. Temperament: Guppies are generally peaceful and well-suited for community aquariums. They are known for their active and lively behavior.

4. Tank Setup: Provide a well-planted aquarium with hiding spots. Guppies appreciate a mix of open swimming space and vegetation.

5. Water Conditions:

   • Temperature: 75-82°F (24-28°C)
   • pH Level: 7.0-8.5
   • Water Hardness: 5-15 dGH

6. Diet: Guppies are omnivores and will accept a varied diet. Feed them high-quality flakes, pellets, and supplement with live or frozen foods like brine shrimp or daphnia.

7. Breeding: Guppies are prolific breeders, and they are known for their livebearing reproduction. Ensure that the aquarium has places for fry to hide if you want to raise the offspring.

8. Compatibility: Guppies are generally compatible with other peaceful fish, but be cautious with larger or more aggressive tankmates that may nip at their fins.

If you have this specific guppy variety, enjoy observing their vibrant colors and lively behavior. Keep in mind that guppies can interbreed easily, leading to various color combinations and patterns. Ensure proper care, maintain good water quality, and provide a suitable environment for your guppies to thrive.