Similar in appearance to the mosquitofish (Gambusia affinis), the San Marcos gambusia has a prominent dark stripe along the upper edges of the dorsal fin. It reaches about one inch in length.
Life History: The San Marcos gambusia thrives on a diet of small invertebrates. It gives birth to live young.
Distribution: This species is found only in the San Marcos River, Hays County, Texas.
Other: The genus Gambusia contains more than 30 species. The San Marcos gambusia was last collected in the wild in 1983. It is one of the rarest animals of the San Marcos River, and may already be extinct. Reduced flow of water from the springs and water pollution from the growth of nearby cities are the major threats to the San Marcos Gambusia and other species dependent on the unique ecosystem of the San Marcos River. Introduction of non-native species is also a threat because they may destroy aquatic vegetation, prey on endangered animals, or compete with them for food.
Habitat & Range
The San Marcos gambusia lives in clear spring water coming from the headwaters of the San Marcos River.
Life History
The San Marcos gambusia thrives on a diet of small invertebrates. It gives birth to live young.
License & Regulations
A valid Texas fishing license is required for anglers age 17 and older. Licenses are available for residents, non-residents, and short-term durations (1-day, 5-day, and annual). Freshwater and saltwater endorsements may be required for certain waters. Purchase online through the Texas Parks and Wildlife Department website or at authorized license retailers throughout the state.
Frequently Asked Questions
Life History
The San Marcos gambusia thrives on a diet of small invertebrates. It gives birth to live young.
Habitat
The San Marcos gambusia lives in clear spring water coming from the headwaters of the San Marcos River.
Distribution
This species is found only in the San Marcos River, Hays County, Texas.
Regulations
Texas fishing regulations apply to San Marcos Gambusia. A valid Texas fishing license is required for anglers 17 and older. Bag and size limits vary by species and water body. Some species have catch-and-release only restrictions or special tournament regulations. Check the Texas Parks and Wildlife Outdoor Annual for current regulations specific to your fishing location. Possession limits in Texas are twice the daily bag limit unless otherwise noted.
References
| State | Category | Directory | Subcategory | Content | Source |
|---|---|---|---|---|---|
| Texas | Fishing | License | License & Fees | A valid Texas fishing license is required for anglers age 17 and older. Licenses are available for residents, non-reside | Link |
