Moon Snails
(Family) Naticidae
Distinguishing Characteristics: The Moon Snails have oval, almost perfectly spherical shells with a D-shaped aperture. They have a reduced spire. They have a hollow area within the columella called the umbilicus; this umbilicus is visible and open. They lack a siphonal canal.
Habitat: These snails live mostly burrowed in sand in shallow waters.
Diet: Members of this family are very active carnivores that feed exclusively on buried bivalves.
Interesting Facts: Also called Necklace Shells.
Scientific Name: Neverita duplicata
Common Name: Atlantic Moon Snail
Distinguishing Characteristics: Large, grey shell with darker or lighter streaking. Shell usually wider than high. Umbilicus deep, but often covered by brown shell growth. Maximum size 2 inches.
Interesting Facts: Also called a Shark Eye.
Scientific Name: Polinices lacteus
Common Name: Milk Moon Snail
Distinguishing Characteristics: Solid, shiny and smooth white shell, which gives the species its common name. Aperture and umbilicus surrounded by a thickened shell layer. Maximum size around 1.5 inches.
Atlantic Moon Snail
Milk Moon Snail
Common Janthina
Purple Sea Snails
(Family) Janthinidae
Distinguishing Characteristics: The Purple Sea Snails have thin, fragile white and purple shells. The shell is wider than it is tall, and has no siphonal canal. The different species are difficult to tell apart.
Habitat: These snails float on the ocean surface by attaching themselves to rafts of bubbles.
Diet: This family primarily feeds upon surface-floating jellyfish such as the Portuguese Man o' War.
Interesting Facts: Also known as the Purple Storm Snails or the Violet Snails.
Scientific Name: Janthina janthina
Common Name: Common Janthina
Distinguishing Characteristics: Shell a striking purple on the underside, with a paler violet or white top. Shell is much wider than it is tall. Aperture very large, almost half the width of the shell. Maximum size around 1.5 inches wide.