Solution: The total ways to select 4 items: $\binom254 = 12650$. The unfavorable case (no turtles) is $\binom154 = 1365$. The probability of at least one turtle is $1 - \frac136512650 = 1 - \frac2732530 = \frac22572530$. The answer is $\boxed\dfrac22572530$. - Groen Casting