1) Sepia officinalis Linnaeus
2) Sepia orbignyana Férussac
3) Sepia elegans d'Orbigny
Sepiola atlantica d'Orbigny
Rossia macrosoma (Delle Chiaje)
Click on the Matt Stribley images for a closer look.
have to be very careful with the identification
of the two cuttlebones. It is the angle of the spine that is important
and you will have to go to Matt Stribley's site below to see the small
detail. In old specimens of Sepia officinalis the cartilage
on the outside of the cuttlebone can break away and then the shape will
resemble that of Sepia orbignyana.
The following pictures shows this. They are both Sepia officinalis. The first specimen has been damaged and assumes a different shape which means it could be confused with Sepia orbignyana.
body of Cuttlefish is made rigid by the internal cartilageous skeleton
The cuttlebones of all three species of cuttlefish were discovered on the beach at Perranporth, Cornwall, (SW 75). The species were the Common Cuttlefish, Sepia officinalis, the Elegant Cuttlefish, Sepia elegans,and Obigny's Cuttlefish,Sepia orbignyana.
28 January 2003
The cuttlebones of all three species of large British cuttlefish, Sepia, and a Spirula (a tiny mesopelagic cephalopod) shell were also found in the squally conditions on the shore on Perranporth Beach, Cornwall.
18 March 2002
After a few days of gales a large standing of Common Cuttlebones, Sepia elegans, is a reasonably common on Cornish shores. However, the stranding of over 100 cuttlebones on Polperro beach, south Cornwall included seven specimens of the rarer species Sepia orbignyana.
26 January 2002
Along the stretch of coast from west end of Whitsand Bay (Seaton) to Par, and especially Hannafore Point and Looe Harbour beach very many small cuttlebones as you describe over last week, mostly Common Cuttles, Sepia officinalis, but also smaller numbers of Elegant, Sepia elegans, and Obigny's, Sepia orbignyana. The unusually large number of adult Common Cuttles (100-180 mm) too, sometimes numbered several hundred.The situation is difficult to monitor accurately as the stormy weather tends to deposit the cuttlebones, then remove them at the next high tide and (presumably) drop them again elsewhere. These large concentrations I have noted before in previous years after prolonged periods of strong south-west winds, so would suggest that it is likely that weather conditions are causing the unusually high number of strandings of these floating objects.
Date: Sun, 8 Oct 2000 19:47:32 +0100
From: "Stella Turk" <firstname.lastname@example.org>
Subject: Cuttlebones and a coconut etc. on the strandline
To all Beachcombers!
Today on Perranporth Beach, Cornwall, Paul Gainey found the cuttle bones of all three species of Sepia. Most of the bones were in very good condition, and ten of them were the smallest species, Sepia elegans. He also found a large coconut, still with its outer husk, as well as Buoy Barnacles (Lepas fascicularis) and By-the-Wind Sailors (Velella velella). Many live mussels were cast up, many of them containing a female of the tiny crab Pinnotheres which lives in the gill cavity of the host.
Report on Vince Smith's One-List/Cornish Wildlife
on the new identification file
Cuttlefish can change their colour so that are very difficult to see
Culture (Bob Alexander)
Cuttlefish Pages (Matt Stribley)
Cuttlefish Report (Cornwall)
Sepiola (Little Cuttle) (Chris Batt)
Squid Eggs masses (Sussex coast)