- The Guadalupe bass (Micropterus treculi) is a member of the sunfish family. The species is referred to as black bass. The Guadalupe bass is green and unlike other bass, does not have vertical stripes. Another distinguishing feature is that its mouth, when closed, does not extend above its eyes.
- Most bass prefer to live in deep, still lakes. The Guadalupe bass lives mainly in shallow, swift streams. The Guadalupe bass uses large rocks and cypress roots in and around the small streams as shelter from predators.
- The Guadalupe bass generally mate at one year of age. Spawning usually occurs between April and June. The male fish tries to attract a female by building a nest in the gravel floor of a swift stream. A female will lay between 400 and 9,000 eggs and leave. The male will fertilize the eggs and protect them until they hatch.
- The Guadalupe bass is considered a threatened species. This designation does not prohibit it from being caught by sport fishermen. Many fishermen practice catch and release as a method of conservation. This practice helps to ensure that immature fish are allowed to reach reproductive maturity and increases the overall Guadalupe bass populations.
- The Guadalupe bass is a favorite of sports fishermen. The small to medium streams provide a very natural setting for those fishermen who want the quiet of nature. Fishermen can wade into the small streams to test their fishing skills. When hooked, the Guadalupe bass tend to jump and fight, making them an exciting catch.
- This fish is only found naturally in four rivers in Texas. These rivers are the San Antonio River, the Guadalupe River, the Colorado River and the Brazos River. It has been introduced into a fifth river in Texas, the Nueces River with mixed results.
