The San Marcos gambusia was first collected and described in the late 1960’s. The total population then was estimated to be around 1,000. Its habits and diet were similar to other gambusia including the Western mosquitofish. Other than size, color, and location, not much is known about this particular tiny Texas fish. Even the cause of extinction is debatable, the San Marcos River is much cleaner today than it was 100 years ago or in the late 1960’s when it was discovered. Most sources say that the cause of extinction for the San Marcos gambusia was reduced spring flow, pollution, and the loss of native plants where it lived. Hybridization with other closely related fish may also have been a factor as the population shrunk over time. Although Jurassic Park is fiction, scientists are working on several de-extinction projects. In fact, in 2003 scientists did bring back the extinct Pyrenean ibex, a type of wild goat, for 7 minutes before it died, showing de-extinction is possible. The San Marcos gambusia might be a candidate. Scientists would potentially use DNA from specimens collected before 1983. This soft tissue could be used to bring back this tiny extinct fish. There are many organizations in the San Marcos River region that have been working to keep the river clean. The current work being done in that region is helping preserve the endangered wild rice, fountain darter, and San Marcos salamander. Would the San Marcos gambusia be able to survive if it was returned to the San Marcos River in Texas?