This is a very interesting group related to the harps, and similar in general shape to helmets and bonnets; in fact the whole genus was considered part of the Cassidae family for a long time. The largest species is Morum grande, a shell which can reach over 3". But most species are in the 1-2" range. The vast majority of morum inhabit deeper water and are closely associated with sandy areas, which are accessible only through deep-water dredging. Because some species occur in extremely remote areas of the globe, the family holds some of the rarest, most expensive and impossible to obtain shells; such as the coveted Morum veleroae and Morum exquisitum, two shells which are not only unaffordable but basically unavailable at all.

Morum amabilis

Shikama, 1973

35.7mm. Lipol, Balut Is. Philippines. 

UNCOMMON - A gently sculptured species, with rounded shoulder and evenly, finely beaded dorsum.

Morum bruuni

Powell, A.W.B., 1958

39.1mm. Stylaster seamount, Norfolk ridge. 

VERY RARE - A lovely colored species. It comes from a very remote part of the world. Even dead shells, like this one are a treasure.

Morum cancellatum

Sowerby, 1824

46.8mm. East China Sea.

COMMON - This species offers a wide range in size and shape, it is easily confused with similarly shaped and colored Morum.

Morum dennisoni

Reeve, L.A., 1842

51.5mm. Los Monjes, Venezuela.

RARE - The most famous secies of the genus and a former great rarity. This is a large, 2"+ shell, with a vermillion parietal wall.

Morum joelgreenei

Emerson, 1981

44mm. Balut Is. Philippines. 

UNCOMMON - Confined to the central Philippines. This is one of the more colorful species, with a yellow tinted parietal shield.

Morum lindae

Petuch, E.J., 1987

36.8mm. Cabo de La Vela. Colombia.

RARE - An attractive, medium-sized shell, with a cancellated surface and a colorful parietal shield, which can vary greatly in hue.

Morum macandrewi

Sowerby III, 1889

43.2mm. Kominato. Japan.

RARE - Easily confused with other white shielded Morum, this has rounded knobbs instead of ridges. Today extra rare.

Morum matthewsi

Emerson, W.K., 1967

31.6mm. Fortaleza, Brazil.

UNCOMMON - This is the "black" form: A gorgeous little shell that looks like a ripe blackberry. This specimen is very large.

Morum ponderosum

Hanley, 1858

34.5mm. Okinawa. Japan.

RARE - A heavy, compact shell, that despite having a wide range and living in shallow water, is almost never seen alive.

Morum purpureum

Röding, 1798

29.6mm. Kingstown. St. Vincent.

RARE - Extremely attractive: Similar to M. oniscus, but bigger, with a pink to flesh colored parietal shield.

Morum uchiyamai

Habe, T., 1961

64.8mm. East China Sea.

UNCOMMON - A larger Morum, and readily confused with M. grande. It differs in having smoother parietal shield and pyriform shape.

Morum watanabei

Kosuge, 1981

36.2mm. Zamboanga. Philippines.

COMMON - Like a minature M. grande, but stockier and more frilly. The portrayed shell is exceptionally nice, with long scales.