Northern Pike grow to more than 50 inches, and they have lots of teeth. When they're in the mood, they will attack anything. I've caught hundreds of them on fishing trips to Canada, including many trophy size (42 inches or more in Manitoba).
Here in North Texas I guess fire ants and water moccasins are the biggest threat. Maybe a snapping turtle if he got one of your toes..or aliigators in some parts.
But in 2 weeks Ill be surf fishing on the Texas beach, just saw a pic of a 9' lemon shark someone caught. Ill take my line out then get back on safe, dry land and wait for the bite. Bull reds are my target. Once reeled in just a huge head, a shark ate over half of it it as I was bringing it in. a 20 lber..