Carra says Carroll's height and physique will always prove a problem for the opposition.
"We've had big tall lads, people like Heskey or Crouch, who have done very well for us," Carragher told LFC Weekly. "But Carroll has that aggression that makes defenders fear him. He seems like a good lad - someone who'll fit in.
"As a defender you know when you go into certain games against particular players that you're going to have a hard day. There aren't too many of them but I know few people will relish playing against Andy.
"You wake up in the morning and think, 'Ah God - I don't want to play against him.' Everyone who has faced him probably thinks, 'I don't need this today."