MARION — Learn about horseshoe crabs with the Marion Natural History Museum.

On July 24 at 10:30 a.m., Derek Perry — an invertebrate fisheries biologist with the Department of Marine Fisheries — will give a presentation on the horseshoe crabs of Massachusetts.

The presentation will cover the life history of horseshoe crabs, their biology, habitat, population health and stressors.

The talk will be held at the museum. RSVP at marionmuseum.org.