Macrocypraea zebra

Lore & Background

The shells of Macrocypraea zebra are usually long oval in shape, with a smooth and shiny dorsum. The basic color is brown, typically with three wide dark brown transverse bands, several white-bluish spots, and a light gray longitudinal mark on the top called the sulcus. On the sides, the white spots become ocellated, each with a small dark brown spot at the center. The base of the shell is pale brown, and the long, narrow aperture usually bears long dark brown labial teeth; the interior of the shell may be purple. This species is quite similar to Macrocypraea cervus and Macrocypraea cervinetta, but can be easily distinguished in side view by the presence of the ocellated spots, which are missing in the latter two species. In living specimens, the mantle is greyish with short sensorial papillae; the mantle may cover the entire shell and can be withdrawn into the shell opening when the cowry is threatened. The species is distributed in the Atlantic Ocean along North Carolina, Florida, the Caribbean Sea, the Gulf of Mexico, the West Indies as far east as Barbados, and Brazil. They live in tropical low intertidal and subtidal waters, usually on coral reefs or under rocks, at depths from 0 m to 37 m.

Reader's Guide

Macrocypraea zebra holds significance as a distinctive cowrie species within the Cypraeidae family, recognized for its ocellated side spots that set it apart from similar species such as Macrocypraea cervus and Macrocypraea cervinetta. Its shell, reaching up to 133 mm in length, exhibits a smooth, shiny brown dorsum with three dark transverse bands and white-bluish spots, along with a pale brown base and long dark brown labial teeth. The interior may be purple. The species' distribution spans from North Carolina and Florida through the Caribbean Sea, Gulf of Mexico, West Indies to Barbados, and Brazil, inhabiting tropical low intertidal and subtidal coral reefs and rocky areas. The living cowry's greyish mantle, equipped with short sensorial papillae, can fully cover the shell and retract when threatened. The subspecies Macrocypraea zebra dissimilis was described by Schilder in 1924. These characteristics contribute to the species' legacy as a well-documented marine gastropod in Atlantic and Caribbean waters, with its shell morphology providing a clear identification marker among related cowries.

Did You Know?

• The maximum recorded shell length of Macrocypraea zebra is 133 mm.
• The shell sides have ocellated white spots with a small dark brown center.
• The mantle is greyish with short sensorial papillae and can cover the entire shell.
• This species is distributed from North Carolina and Florida to Brazil, including the Caribbean Sea and Gulf of Mexico.