Fan worms look more like feather dusters than animals. If you come across one while swimming in the ocean, all you’ll see is a beautiful spray of feathery tentacles, sprouting from a rock.

In the study, published in the journal Scientific Reports, the report authors note that the retreat of an ancient worm and prey into the sediment could have caused the “feather-like ...

The distinctive, feather-like structures around the upper burrow were also ... are part of an international team that named the homes of these ancient giant worms Pennichnus formosae. Pan initiated ...