How poisonous are small rattlesnakes?

I am not 100% percent for sure but I think that is a WATER SNAKE BUT if youer not fodr sure I would look it up oon a snake site google search snake info and see snakes sites and find a pic of it and read up on it that would be my advice Hope this helps

-Diva

It might not be poisonous if it is in a small creek because how would that be in a small creek!?

-Belieber