如何使图像完全适合轮播（Bootstrap）

我已经制作了一个功能齐全的旋转木马，但问题是旋转木马的右侧出现了白色块。我想摆脱它。请帮忙。

<div class="carousel-inner">
  <div class="item active">
    <img src="Jellyfish.jpg" alt="image">
    <div class="carousel-caption">
      <h2>This is the heading</h2>
      <p>This is paragraph</p>
    </div>
  </div>
  <div class="item">
    <img src="Koala.jpg" alt="image">
    <div class="carousel-caption">
      <h2 style="color:orange">This is the heading</h2>
      <p>This is paragraph</p>
    </div>
  </div>
  <div class="item">
    <img src="Penguins.jpg" alt="image">
    <div class="carousel-caption">
      <h2>This is the heading</h2>
      <p>This is paragraph</p>
    </div>
  </div>
    <a href="#caro" class="left carousel-control" data-slide="prev">
      <span class="glyphicon glyphicon-chevron-left"></span>
    </a>
    <a href="#caro" class="right carousel-control" data-slide="next">
      <span class="glyphicon glyphicon-chevron-right"></span>
    </a>
</div>

设置图像width:100%

.item img {
  width:100%
}

这是演示：https://jsfiddle.net/u9kkdLzb/