The Yellow Bloon is a Bloon that appears in all the Bloons Tower Defense series, Bloons series, BSM series and Bloons Monkey City. They usually appear in Round 11, and are the first real threat encountered by most players. They are the fastest out of all the Bloons in BTD1, BTD2 and BTD3, the second fastest Bloons in BTD4 and BTD5 following the Pink Bloons, and also the second fastest in BMC, behind Pink Bloons and D.D.T.'s (who are the same speed). Yellow Bloons are the parents of Green Bloons and the grandparents of Blue Bloons. Their parents are Pink Bloons, and their grandparents are White Bloons or Black Bloons. When a yellow Bloon and its children are all popped it yields a total of $4. Yellow Bloons also appear in the Bloons games, but only take one hit to pop.