However potentially deadly the venom may be, chances of survival are extremely high if you receive immediate medical attention. You should know about Mexico's poisonous snakes because 2 families of snakes are poisonous and dangerous for man: elapids (sea serpent, coral reefs), vipridae (rattlesnakes, nauyacas, cantil). Huatulco Mexico Resorts: Which Ones are the Best? } When in doubt, youre better off safe than sorry. Habits. Not nice at all display: inline; }