TAXONOMY:
Kingdom: Animalia
Phylum: Mollusca:
Class: Gastropoda (snails and slugs)
Order: Vetigastropoda: (primitive group of sea snails)
Family: Trochidae (“top snails”, because in many species the shell is shaped like a toy top)
Genus/species: Norrisia norrisi
GENERAL CHARACTERISTICS: Smooth brown shell that ranges in size from a few mm to 55mm or 2 inches.
DISTRIBUTION/HABITAT: Eastern Pacific found on kelp from Point Conception to Baja California, May live in water 15-24°C or 59 to 75°F.
DIET IN THE WILD: The Norris’ top snail feeds mainly on brown algae but in aquariums they use their file-like tongue or radula to eat most types of algae helping to keep the aquarium clean.
PREADATORS: Commonly eaten by seastars.
REMARKS: Used to help control algae in the Philippine coral reef. PR04
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