Invertebrates
See our handy guide to critters found in local homes and our Central Coast Butterfly FAQ. Browse the insects and other terrestrial arthropods we’ve identified. Check out local marine invertebrates, particularly bivalve mollusks and intertidal organisms.
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What is this ?
My son is completing his science project on our local tidepools. We've identified all specimens during our field study, except for the attached. Can you help?
Andrea, Coal Oil Point - May 9, 2020
Curator Response
Hi Andrea,
This is Norrisia norrisi, commonly known as Norris' Top-shell or Norris's Topsnail.
By the way, on its surface in one of your photos are two Crepidula norrisiarum, also known as slipper limpets.
Stay curious,
Howard/Berry Chair and Curator of Malacology Henry W. Chaney, Ph.D.