HTML/CSS Image Rollover/Animation, specific case with existing code, how to change animation?

ok, I have don some web development in the past, but am fairly new to "css/webkit" animations.

I have an image on my website, that goes through an animation when a user "hovers" over the image, as so:

What I want to do is change this animation.

I want to remove the red "arrows" icon at the bottom-right. I think I want to keep the opacity transition, BUT, I want to display a DIFFERENT image, if the user is hovering over the image.

Here is the HTML code for the image:

<div class="col-md-4">

                            <div class="team" data-animation-name="fadeInRight">

                                <div class="team-photo">
                                    <figure>
                                        <img src="demo/team/dfds_seaways_ship.jpg" alt="">
                                        <figcaption>
                                            <a href="#">
                                                <i class="gi gi-resize-full"></i>
                                            </a>
                                        </figcaption>
                                    </figure>
                                </div>

I did not write this code, and so I am, unfortunately, quite lost.

I think I should show the "css-classes" used here.

    /* ==========================================================================
    Team
============================================================================= */
.team {
  -webkit-transform: translate3d(0, 0, 0);
  transform: translate3d(0, 0, 0);
  margin-bottom: 30px;
}
.team .team-photo {
  position: relative;
  margin-bottom: 15px;
  overflow: hidden;
}
.team .team-photo figcaption {
  position: absolute;
  left: 0;
  top: 0;
  width: 100%;
  height: 100%;
  background-color: rgba(255, 255, 255, 0.5);
  -webkit-transition: opacity 0.25s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  transition: opacity 0.25s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  opacity: 0;
}
.team .team-photo figcaption a {
  display: block;
  position: absolute;
  z-index: 1;
  width: 44px;
  height: 44px;
  overflow: hidden;
  right: 0;
  bottom: 0;
  text-align: center;
  text-decoration: none;
  color: #fff;
  background-color: #e35a55;
  -webkit-transform-origin: 100%;
  -moz-transform-origin: 100%;
  -ms-transform-origin: 100%;
  transform-origin: 100%;
  -webkit-transform: rotate(-90deg);
  -ms-transform: rotate(-90deg);
  transform: rotate(-90deg);
  -webkit-transition: -webkit-transform 0.25s cubic-bezier(0.25, 0.46, 0.45, 0.94), background-color 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
  transition: -webkit-transform 0.25s cubic-bezier(0.25, 0.46, 0.45, 0.94), transform 0.25s cubic-bezier(0.25, 0.46, 0.45, 0.94), background-color 0.4s cubic-bezier(0.25, 0.46, 0.45, 0.94);
}
.team .team-photo figcaption a .fa,
.team .team-photo figcaption a .gi {
  width: 44px;
  height: 44px;
  line-height: 44px;
  font-size: 16px;
}
.team .team-photo figcaption a:hover {
  background-color: #000;
}
.team:hover .team-photo figcaption,
.team.touch .team-photo figcaption {
  opacity: 1;
}
.team:hover .team-photo figcaption a,
.team.touch .team-photo figcaption a {
  -webkit-transform: rotate(0);
  -ms-transform: rotate(0);
  transform: rotate(0);


.team .team-info {
  text-align: center;
  padding: 0 15px;
}
.team .team-name {
  margin: 0;
}
.team .team-data {
  display: none;
}

I tried "just" adding onMouseOver and OnMouseOutEvents, allthough I am unsure if that would be the right/best way to do this, like so:

<img src="demo/team/dfds_seaways_ship.jpg" alt="" onmouseover="this.src='demo/team/dfds_seaways_ship2.jpg'" onmouseout="this.src='demo/team/dfds_seaways_ship.jpg'">

But it isn't working. This was my naive approach, with my web dev knowledge from a while ago, but I would like to do this by conforming to the CSS approach taken here by the developers of this site.

To be honest, I am lost, so if anyone can help me, or explain to me how I can do this easily with the CSS code that is available, I would be extremely happy, so I can get this done.

If more information is needed, let me know. And I hope the gif above (of the ship) displays fine, on my machine it doesn´t display correctly on IE, but on chrome it displays fine.

Thanks for any and all help!

C