Image source: Jackson | inaturalist.org
Poecilia mexicana, commonly known as the shortfin molly or Atlantic molly, is a species of poeciliid fish native to fresh and brackish water in Mexico and Guatemala, Rio San Juan. One population is found in caves and known as the cave molly. The maximum standard length of this fish is 11 cm (4.3 in). It typically grows to a total length 4 cm (1.6 in). The fish lives in tropical freshwater and brackish water habitats. The shortfin molly is considered benthopelagic. It lives in a pH range between 7.0 and 7.5 at temperatures between 22 and 28 degrees Celsius. The species does not migrate. It is an invasive species in the Muddy River of Nevada, USA.
The more catches you post, the higher your chances of winning this amazing prize.
Every catch shared between May and November 2025 is automatically entered into the prize draw.
Only one rule: Make sure to tag both the fish species and the body of water!
