Crustaceans eroding an island into the sea

An island off the coast of Hiroshima is being eaten away by crustaceans. The photo on the left is what the island looked like back in 1955. As you can see, the island had two peaks. One with a few trees growing on it. The photo on the right, shows the island as it is now.
It seems that the crustaceans burrow into the rock that makes up the island to lay their eggs. The small holes that they burrow then cause the island to be much more susceptible to natural tidal erosion and typhoons.

Via MSN-Mainichi Daily News: Crustaceans eating away island off Hiroshima