But what is it? At least somewhat aquatic snake (eyes on top the head, can't tell if they are slitted or round pupil), vaguely triangular head (inconclusive, many non-venomous snakes do that under stress), pattern kind of looks like a copperhead's hourglasses), but the mouth looks like some kind of rat snake, the way it's curled up in the net doesn't indicate a venomous snake (doesn't preclude it either)...