This is a juvenile Diamondback Water Snake. These are one of several types of harmless water snake in Texas. This one was about 8-10 inches long. A full grown adult can reach 5 foot.
Read next
From @thecommentor
This is a juvenile Diamondback Water Snake. These are one of several types of harmless water snake in Texas. This one was about 8-10 inches long. A full grown adult can reach 5 foot.