The former largest iceberg is turning blue. It’s a bad sign.

One of the oldest icebergs that has ever been tracked is feeling the blues. The megaberg A23a is most likely on its last legs, and has been captured turning blue because of meltwater. The iceberg was once the largest in the world, though it has been drastically shrinking and is now just a fraction of its former size. Given these changes, experts believe it won’t be around for much longer.

Blue period

Iceberg A23a is “sopping with blue meltwater and on the verge of complete disintegration,” said a NASA news release.