Blue monkeys are seen with light blue bodies that are a darker shade of blue on the edges of the monkey. Blue monkeys have a gaping red mouth, with two small teeth. They are always seen holding onto a line.
Blue monkeys sit holding on to a line, and do nothing. They are usually on line in front of where Black Ball needs to go, and the player will have to move the line they are on so Black Ball can pass the monkey unharmed, or try to make Black Ball avoid them in another way. If Black Ball touches a monkey, he will lose one of his hearts.