Rare translucent blind catfish discovered in Texas

Two Mexican blind catfish discovered in an underwater cave near Del Rio, Texas.

CBS DFW via Danté Fenolio/

SAN ANTONIO -- A never before seen species of fish was recently discovered in Texas -- and they're unique in color, size, and the fact that they're blind, CBS Dallas-Fort Worth reported.

The endangered eyeless catfish, or Mexican blindcat, was previously known to exist only south of Texas in Mexico.

After rumored to have been seen one other time, a pair of the fish were discovered in a limestone cave at Amistad National Recreation Area, about 150 miles west of San Antonio. The fish were found in May and have been relocated to the San Antonio Zoo.

The Mexican blindcat is unique because it won't grow larger than three inches long. The blindcats have a pinkish-white color because their blood can be seen through their translucent skin.

According to Dean Hendrickson, curator of ichthyology at the University of Texas at Austin, the discovery is the first confirmed blindcat sighting in Texas, CBS DFW reported.

The fish are not yet on display at the San Antonio Zoo, and are being held in a special facility designed to accommodate cave and aquifer species.

With the discovery, the U.S. now has a total of three blind catfish species, all of which were found in Texas. The two other species are the toothless blindcat and the widemouth blindcat.