Meat-Eating Sponges?

The Christian Science Monitor has an interesting little piece on the efforts of marine biologists to take a census of ocean life:

They've discovered, for instance, meat-eating sea sponges, and they've tracked a blue-fin tuna as it crossed the Pacific three times in less than two years.

Link. Hold the phone—meat-eating sponges? If one of those things got loose, not even Steve McQueen would be able to save us. Especially since he's been dead for twenty-five years.

Indexed by tags science, nature, marine, biology, meat-eating sponge, census.
Image credits: The Blob Movie Poster, available at Fortune City, borrowed for news-reporting and comment purposes.