The Slithery Dee is a children's poem about a sea monster, written by Shel Silverstein. The most famous recording of it is by the Smothers Brothers.
Text
Oh... The Slithery Dee
He lives in the sea
He saw all the others
But he didn't see me
The Slithery Dee
He came out of the sea
He chased all the others
But he didn't chase me
The Slithery Dee
I hid in a tree
He caught all the others
But he couldn't catch me
The Slithery Dee
He went back to the sea
He ate all the others
But he didn't eat me
The Slithery Dee
Oh where can he be?
He ate all the others
But he'll never eat --- (abrupt stop and a strange noise)
References
Slithery Dee Wikipedia(Text) CC BY-SA