Overview
Endler's Livebearer is a tiny cousin of the guppy that comes from warm, weedy ponds and lagoons in northern Venezuela, in South America. The males are the show-offs, wearing bright patches of orange, metallic green, and black that seem to glow under aquarium lights. Females are larger and plainer, wearing a soft silver that helps them stay hidden while they carry their babies.
These little fish are called livebearers because they give birth to fully formed, swimming babies instead of laying eggs. A single female can have a new batch every few weeks, so a small starter group can quickly turn into a busy crowd. They are friendly, active, and always on the move, which makes them a favorite first fish for curious keepers who want a splash of color.
| Care level | Easy |
| Adult size | 1 in (2.5 cm) |
| Lifespan | 2-3 years |
| Temperament | Peaceful |
| Min. tank | 10 gallons (38 L) |
| Temperature | 72-80 F (22-27 C) |
| pH | 7.0-8.0 |
| Diet | Omnivore |
| Schooling | Yes, keep a small group |
Where they come from
Wild Endlers live in warm, shallow, plant-filled waters in the Paria Peninsula of Venezuela. The water there is often a little hard and slightly salty, which is why they do well in tanks with steady, clean conditions.
Living jewels
Male Endlers are some of the most colorful small fish in the world. Their colors are not from paint but from tiny structures in their skin that bounce light, a bit like the shimmer on a soap bubble or a butterfly wing.
Baby boom
Because females give live birth so often, an Endler tank can fill up fast. Floating plants like hornwort give the newborn fry hiding spots so more of them survive to grow up.
Easy roommates
Endlers are gentle and get along with other calm, small fish. They love a planted tank where they can dart between leaves and nibble tiny bits of food all day long.
Fun facts
- Endlers were named after Professor John Endler, who collected them in Venezuela in the 1970s.
- A male Endler is often smaller than the fingernail on your pinky.
- They can crossbreed with guppies because the two fish are close relatives.
- Females can give birth to a new batch of babies roughly every three to four weeks.
- Their bright colors help males catch the attention of females during courtship displays.
Frequently asked questions
Are Endlers good for beginners?
Yes. They are hardy, small, and easy to feed, which makes them a great starter fish as long as the tank stays clean and warm.
Do I need a heater?
In most homes a small heater helps keep the water in the 72 to 80 F range they like, so it is a smart idea.
Why does my tank keep filling up with fish?
Endlers are livebearers and breed easily. If you keep males and females together, expect lots of babies over time.
What should I feed them?
Give them crushed flake food, tiny pellets, and now and then a treat of baby brine shrimp. Feed small amounts a couple of times a day.
