Blue Panchax (Aplocheilus panchax) is an intermediate-level freshwater fish that needs at least 20 gallons and 72-82°F. A slim surface-dwelling killifish with a yellow-gold body and a bright blue-edged tail. It will swallow baby fish and very small shrimp, and it jumps, so it needs a snug lid and floating plants for cover.

Care facts at a glance

Scientific nameAplocheilus panchax
FamilyAplocheilidae
OriginIndia and Southeast Asia
Adult size3 in
Minimum tank20 gallons
Temperature72-82°F
pH6.5-7.8
TemperamentPeaceful with similar-size fish, eats fry and tiny fish
Social behaviorSmall groups; males squabble
Swim levelTop
DifficultyIntermediate
DietCarnivore: live and frozen foods, flakes, small insects
Typical lifespan2-3 years

Quick tips

  • Use a tight lid; it jumps readily.
  • Do not mix with tiny fish or fry.
  • Keep one male with a few females to reduce squabbling.

San Diego water

Tolerates San Diego's hard, alkaline tap water (pH roughly 7.6-8.6) with slow acclimation and a conditioner that handles chloramine. Learn the numbers in our San Diego tap water guide.

Before you buy

Make sure your tank is cycled (how to cycle a tank), check your numbers with the water testing guide, and use the compatibility guide to check tankmates. These are general ranges; individual fish and local water vary.

Find it at Pet Zone

Pet Zone Tropical Fish is a San Diego aquarium store with two locations. Stock changes daily, so call ahead if you are after a specific species or plant. Shop online at petzonesd.com.

Pet Zone Convoy

4160 Convoy St, San Diego, CA 92111
(858) 987-0309
Open daily, 10am-6pm

Aquascaping, planted tanks

Pet Zone Mid-City

4266 University Ave, San Diego, CA 92105
(619) 283-1812
Closed Monday; Tue-Fri 10:30am-6pm, Sat 11am-6pm, Sun 11am-4pm

Monster fish, koi