Bloody Mary Hillstream Loach (Gastromyzon sp. ‘Bloody Mary’)
Known for its bright red tail, dorsal fins, and the upper back, this loach features a striking contrast against its black body.
Basic Information
| Temperament | Peaceful |
|---|---|
| Max Size | 2″ |
| pH | 6.0–7.5 |
| Temperature | 70–76ºF |
| Diet | Herbivorous |
Thrives in highly oxygenated water conditions.
FAQ
What makes the Bloody Mary Hillstream Loach stand out in appearance?
It has bright red coloring on the tail, dorsal fins, and the upper back, contrasting with its black body.
Is this loach suitable for community tanks?
Yes, it is peaceful and can coexist with other non-aggressive fish species.
What water conditions does it require?
It needs highly oxygenated water with a pH between 6.0 and 7.5 and a temperature range of 70–76°F.




Dylan Chapman –
The Bloody Mary loach is a stunning addition to my tank. Its bright red fins stand out beautifully against the dark body. It’s very calm and doesn’t bother other fish. I keep it in a well-aerated tank with stable water parameters and it’s thriving.
Megan Payne –
I was impressed by how active and colorful it is. It stays near the surface and enjoys the flow of water. The red markings are vivid and make the tank more interesting. Feeds well on algae wafers.
Mary Slater –
Easy to care for and very peaceful. I’ve had it for three months and it’s still healthy and active. The water quality needs to be good, but once set up properly, it’s a great choice for beginners.