When they’re young, sheepshead fish will eat marine worms, bryozoan ‘moss animals’ and pretty much anything soft-bodied they can catch in the seagrasses.

Comparing these samples with modern ones, scientists have now shown that the growth of a bryozoan, a tiny animal, has increased in recent years.

That was also the geologic moment when a whole raft of brachiopods and bryozoans—stalked seafloor dwellers and mossy-looking colonial organisms—disappeared.