Green Lizard Loach
The green lizard loach is part of the hillstream loach family and goes by several common names, including gecko loach and Tweedie’s hillstream loach (after the discoverer). Green lizard loaches come from Indonesia and are wild-caught and not often available for us hobbyists. The freshwater loach is hardy, peaceful and adapts well to most aquariums. However, these are mountain loaches and will not tolerate water temperatures above 80 degrees. These loaches can even be kept in indoor aquariums without heaters.
Quick Facts
| Scientific Name | Homalopteroides tweediei |
|---|---|
| Origin | Malaysia and Indonesia |
| Care Level | Moderate (needs cool, fast, oxygen-rich water) |
| Temperature Range | Below 80°F |
FAQ
What is the ideal water temperature for green lizard loaches?
Green lizard loaches thrive in water temperatures below 80°F. They are sensitive to warm water and should not be kept in environments exceeding this temperature.
Can green lizard loaches live in an indoor aquarium without a heater?
Yes, green lizard loaches can be kept in indoor aquariums without heaters, provided the ambient room temperature stays below 80°F.
Where do green lizard loaches originate from?
Green lizard loaches are native to Malaysia and Indonesia.

Alexandra McGrath –
I bought this loach for my 10-gallon tank and it has been very active and calm. The water temperature has stayed below 80°F, and it’s adapted well to the setup. A peaceful addition to my community tank.
Emily Walker –
The loach looks healthy and moves naturally in the stream-like flow. I didn’t need a heater, which was a relief. Just make sure the room doesn’t get too warm during summer.
Gordon Coleman –
Great choice for a beginner-friendly, peaceful fish. It’s not aggressive and fits well with other community fish. I’ve kept it for over three months with no issues.