The smaller two snails on the back of the larger shell.
Hooked slipper snails attached to Ida's mitre.
Freeloaders (parasites?) on the underside of horseshoe crabs. The crabs were dead.
collected offshore, photographed in the lab.
This is Crepidula cf. marginalis since true marginalis has a different shape but they are awaiting revisions. This is a very dark morph.