The Guadalupe bass (Micropterus treculii) is a rare species of fish endemic to the U.S. state of Texas, where it also is the official state fish. It is restricted to creeks and rivers and was formerly listed as vulnerable, but IUCN currently considers the data insufficient to determine its status. Guadalupe bass, like most black bass, are lime to olive green in color; this particular species being lighter in shade. They have a lateral line covered in mostly separate diamond shaped or circular spots; which with age fades from black to olive. There are also many smaller diamond marks scattered on the back which are less distinguished than the ones on the lateral line. So far the record is 3.69 lbs (3 lbs 11 oz.) Its main habitats are the San Marcos, Colorado, and Guadalupe rivers. They can also be found in run-off creeks such as Barton Creek, Onion Creek, San Gabriel river, and The Comal river. The species has also been farm raised and stocked in the Llano river. The Guadalupe bass has almost no predators. In fact its main threat is not predation, but hybridization with the introduced smallmouth bass. The two species are very closely related and in some rivers almost half the Guads are hybrids. The Texas Parks and Wildlife Dept. stated it will likely stock many bass in the future to beat out the hybrid population. This will be a pilot for several other areas where rare spotted bass sub-species are having the same problems. Typically, Guadalupe bass are found in streams and reservoirs; absent from extreme headwaters. The Guadalupe bass prefer flowing waters of streams within native variety, and use covers like large rocks, cypress knees or stumps for refuge.