Sentences with phrase «serrated spine»

A partially serrated spine helps if you come across situations that require a saw and the blade itself sharpens easily and stands up to corrosion.

To get a feel for what scientists are up against, start with the photos, a gallery of rogues that poison their enemies — such as the dinoflagellate Alexandrium tamarense — or stab them to death — including a Chaetoceros species that plunges its serrated spines into the gills of fish.