Ameliorate the Human Shark

 directions: ameliorate the following sentence. There are three missing commas. 

“'I am a shark Cassie,’ he says slowly drawing the words out as if he might be speaking to me for the last time."

QUESTION:  
Is this an example of metaphor or simile?

Suggested Answer: 
 “'I am a shark, Cassie,’ he says slowly, drawing the words out, as if he might be speaking to me for the last time."