The toothless blindcat (Trogloglanis pattersoni) is a species of North American freshwater catfish endemic to Texas in the United States.

The eye remnants are extremely reduced in size, with very little or no trace of a retina or lens; the optic tract is present, but always regresses before reaching the brain.

The stomach is reduced in size and surrounded by deposits of adipose tissue allowing for adequate energy to be stored.

The lateral line is fragmented and reaches to between the anterior to the posterior end of the adipose fin.

This species also has a few paedomorphic traits (indicated by small size which ranges from 16–89 millimetres or 0.63–3.50 inches,[3] kidney morphology, and weak ossification of the skeleton).