Hard to tell from the angle. Is there a hood over the eyes like in this pic? In most cases I can tell straight away from a common watersnake and a cotton mouth but in this case I just can't. Maybe Jack can tell...https://www.critterriddertx.com/texas-water-moccasin/
Discussion
I’d say the body was similar in size to the head, which might indicate a water snake. Just sprayed it with the hose to get it away from kids areas. Fun stuff!