It is akin to the Texas blind salamander Eurycea rathbuni.

Also depicted are eyeless, subterranean creatures, such as the Texas blind salamander and ("bizarrely") a species of crab.

Amphibians: Texas blind salamanders, spring salamanders, Amazon milk frogs.

Other aquatic troglobites include cave fish, the Olm, and cave salamanders such as the Texas Blind Salamander.

The springs are home to several threatened or endangered species, including the Texas Blind Salamander, Fountain Darter, and Texas Wild Rice.

The lake is home to the Texas blind salamander and two rare fish, the San Marcos Fountain Darter and San Marcos Gambusia.

There are reptiles and amphibians going, also: the alligator, blunt-nose leopard lizard, San Francisco garter snake, Santa Cruz long-toed salamander, Texas blind salamander and the black toad."

The Texas blind salamander (Eurycea rathbuni), is a rare cave-dwelling troglobite amphibian native to San Marcos, Hays County, Texas, specifically the San Marcos Pool of the Edwards Aquifer.

Aquarena Center has been designated as a "critical habitat," subject to the Endangered Species Act, because the springs are home to the fountain darter, the Texas Blind Salamander, the San Marcos Salamander, the San Marcos gambusia, and Texas Wild Rice.

Eurycea neotenes and Eurycea rathbuni also live in caves and eat small bugs and other species of insects and spiders.