<p>
  The sailfish is named for its sail-like dorsal fin and is widely considered the fastest fish in the ocean.
  <a href="https://en.wikipedia.org/wiki/Sailfish">You can read more about it here</a>.
</p>

<p>
  The red lionfish is a predatory scorpionfish that lives on coral reefs of the Indo-Pacific Ocean and more recently in
  the western Atlantic. <a href="" class="dead-link">You can read more about it here</a>.
</p>

a::after {
  content: ' (' attr(href) ')';
}

.dead-link {
  text-decoration: line-through;
}

.dead-link::after {
  content: url('../../media/warning.svg');
  display: inline-block;
  width: 12px;
  height: 12px;
}