Some Australian dolphins use sponges to hunt fish, but it's harder than it looks apnews.com 2 points by c420 13 hours ago
WalterGR 12 hours ago Also see this post from 10 years ago of an article from The Atlantic: https://news.ycombinator.com/item?id=10749870
Also see this post from 10 years ago of an article from The Atlantic: https://news.ycombinator.com/item?id=10749870