html, body {
  width: 100%;
  height: 100%;
  overflow: hidden;
}

body {
  background: linear-gradient(#99ccff, #eee);
}

.wave {
  position: absolute;
  width: 150%;
  left: 150px;
  height: 1250px;
  bottom: -1100px;
  margin-left: -25%;
  background-color: #004466;
  opacity: 0.9;
  animation: waves 3s ease-in-out;
  animation-iteration-count: infinite;
  z-index: 3;
}

@keyframes waves {
  0% {
    transform: translate(5, 5);
  }
  30% {
    transform: translate(-8px, 15px) rotate(1deg);
  }
  60% {
    transform: translate(8px, 5px) rotate(-2deg);
  }
  100% {
    transform: translate(0, 0);
  }
}
.whale {
  position: absolute;
  bottom: 100px;
  left: 50%;
  width: 600px;
  height: 300px;
  margin-left: -300px;
  z-index: 2;
  animation: swim 7s linear;
  animation-iteration-count: infinite;
}
.whale .body,
.whale .tail {
  float: left;
}



.whale .body {
  width: 480px;
  height: 300px;
  background-color: #333;
  border-bottom-left-radius: 150px 100px;
  border-top-left-radius: 300px 300px;
  border-bottom-right-radius: 100px 80px;
  border-top-right-radius: 600px 500px;
}
.whale .body .eye {
  animation: rotate-eye 8s ease-in-out infinite;
  position: absolute;
  background-color: #fff;
  border-radius: 50%;
  width: 30px;
  height: 30px;
  top: 200px;
  left: 60px;
}
.whale .body .eye::after {
  content: '';
  display: block;
  background-color: #222;
  width: 15px;
  height: 15px;
  border-radius: 50%;
  margin: 12px 0 0 2px;
}

.whale .tail {
  animation: rotate-tail 2s ease-in-out infinite;
  margin: 170px 0 0 -10px;
}
.whale .tail::after,
.whale .tail::before {
  content: '';
  display: block;
  background-color: #333;
  width: 120px;
  height: 100px;
  border-radius: 10% 80%;
  border-top-left-radius: 0;
}
.whale .tail::before {
  border-radius: 80% 10%;
  border-bottom-left-radius: 0;
  margin: 0 0 -30px 0;
}

@keyframes swim {
  0% {
    transform: translate(0, 0);
  }
  30% {
    transform: translate(100px, -15px);
  }
  60% {
    transform: translate(-100px, -5px);
  }
  85% {
    transform: rotate(-360deg);
  }
  100% {
    transform: translate(5, 5);
  }
}

@keyframes rotate-tail {
  0% {
    transform: rotate(-20deg);
  }
  50% {
    transform: rotate(20deg);
  }
  100% {
    transform: rotate(-20deg);
  }
}

@keyframes rotate-eye {
  0% {
    transform: rotate(0);
  }
  100% {
    transform: rotate(720deg);
  }
}