What is a possible difference between a coral snake and a scarlet snake?

If the snake has a black nose then it’s a coral snake also there’s a poem to help you remember:
Red touch yellow - kills a fellow
Red touch black - venom lacks
Yellow touches red - soon you’ll be dead
Red touches black - friend of jack

The coral snake rhyme varies from person to person, but the general premise is the same: Red touch black, safe for Jack. Red touches yellow, kills a fellow. The coral snake will have bands of red touching smaller bands of yellow. ... This is another difference between the coral snake and the pit viper.

The littoral zone. . .