I have a pet king snake... a coral snake can bite you dead. It's an elapid and has a potent neurotoxin (like an asp or sea snake.) They aren't very agressive, but a bite is very dangerous.
King snakes are non-agressive and quite beneficial to have around. As snakes go; they make very good, docile pets.
King snakes:
(Mine looks very similar to this one.)
Coral Snake:
