Sepia sewelli is a species of cuttlefish

Cuttlefish

Cuttlefish are marine animals of the order Sepiida. They belong to the class Cephalopoda . Despite their name, cuttlefish are not fish but molluscs....

 native to the western Indian Ocean

Indian Ocean

The Indian Ocean is the third largest of the world's oceanic divisions, covering approximately 20% of the water on the Earth's surface. It is bounded on the north by the Indian Subcontinent and Arabian Peninsula ; on the west by eastern Africa; on the east by Indochina, the Sunda Islands, and...

, from Cape Guardafui

Cape Guardafui

Cape Guardafui , also known as Ras Asir and historically as Aromata promontorium, is a headland in the northeastern Bari province of Somalia. Located in the autonomous Puntland region, it forms the geographical apex of the region commonly referred to as the Horn of Africa.-Location:Cape Guardafui...

, Somalia

Somalia

Somalia , officially the Somali Republic and formerly known as the Somali Democratic Republic under Socialist rule, is a country located in the Horn of Africa. Since the outbreak of the Somali Civil War in 1991 there has been no central government control over most of the country's territory...

 (11°57′N 50°35′E to 05°40′S 39°17′E) to Zanzibar

Zanzibar

Zanzibar ,Persian: زنگبار, from suffix bār: "coast" and Zangi: "bruin" ; is a semi-autonomous part of Tanzania, in East Africa. It comprises the Zanzibar Archipelago in the Indian Ocean, off the coast of the mainland, and consists of numerous small islands and two large ones: Unguja , and Pemba...

 and probably Madagascar

Madagascar

The Republic of Madagascar is an island country located in the Indian Ocean off the southeastern coast of Africa...

. It lives at depths of 37 to 238 m.

S. sewelli grows to a mantle

Mantle (mollusc)

The mantle is a significant part of the anatomy of molluscs: it is the dorsal body wall which covers the visceral mass and usually protrudes in the form of flaps well beyond the visceral mass itself.In many, but by no means all, species of molluscs, the epidermis of the mantle secretes...

 length of 30 mm.

The type specimen was collected near Cape Guardafui

Cape Guardafui

Cape Guardafui , also known as Ras Asir and historically as Aromata promontorium, is a headland in the northeastern Bari province of Somalia. Located in the autonomous Puntland region, it forms the geographical apex of the region commonly referred to as the Horn of Africa.-Location:Cape Guardafui...

 (11°57′12"N 50°35′00"E to 11°56′42"N 50°39′12"E) and is deposited at The Natural History Museum in London

London

London is the capital city of :England and the :United Kingdom, the largest metropolitan area in the United Kingdom, and the largest urban zone in the European Union by most measures. Located on the River Thames, London has been a major settlement for two millennia, its history going back to its...

.