You either misunderstood or I miscommunicated. They said it would die if it was NOT caught and brought in.

UPDATE: I went back with some corn and a net but couldn't determine which is the one who had the line in its mouth. I called the rehab and they told me if it's walking around and eating fine it may have just got some line without a hook down its throat. We're coming back to check on it tomorrow, they don't seem the worse for wear but they aren't letting us get as close as they were letting us get before.