In rough periwinkle snails, embryos form and mature inside the brood pouch at different rates, as seen here. When it’s time to hatch, youngsters may have to crawl out of mom’s body and into ...

Oil companies, levees and the burrowing nutria have been blamed for destroying Louisiana's marshes -- and now a new culprit arrives: the periwinkle snail.

A recent study indicates there might be a new link between blue crabs and the health of the Chesapeake Bay. Declining crab populations could weaken marshes, which play critical roles in filtering p… ...

In one longterm study, Kingston has focused her students’ attention on the rough periwinkle, a common snail found clinging to rocks up and down Maine’s shoreline. This project could open a window into ...

Periwinkle snails, known to science as Littoraria irrorata, normally coexist happily with salt marsh. But the drought, which lasted from 1999 to 2001, ...

A checkered periwinkle marine snail, similar to these sitka periwinkles, was found growing inside an abscess on an 11-year-old Southern California boy’s arm. Emily Grason University of ...