Sepia latimanus

Sepia latimanus

Sepia latimanus, Broadclub cuttlefish

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Kingdom
Phylum
Class
Order
Family
Genus
SPECIES
Sepia latimanus
Weight
10 kg
Length
170-240 mm

Sepia latimanus, also known as the broadclub cuttlefish, is widely distributed from the Andaman Sea, east to Fiji, and south to northern Australia. It is the most common cuttlefish species on coral reefs, living at a depth of up to 30 m.

Appearance

The broadclub cuttlefish is the second largest cuttlefish species after Sepia apama, growing to 50 cm (20 in) in mantle length and 10 kg (22 lb) in weight. Like many cephalopods, the broadclub can be seen displaying a range of colors and textures. Commonly they are light brown or yellowish with white mottled markings. Males are sometimes dark brown, particularly during courtship and mating. The arms have longitudinal white bands that appear as broad white blotches when extended. Some arms have longitudinal brown bands that extend to the head. The dorsal mantle can sometimes be seen with a saddle mark with small white and brown spots. The dorsal mantle also has narrow brown transverse bands, and bold, white, transverse stripes and spots. The eyes are yellow around the ventral margins and the fins are pale with white, transverse stripes extending onto mantle and narrow, white bands along outer margins.

Habits and Lifestyle

Sepia latimanus is a coastal species occurring in coral reefs and which is found in shallow water to depths of 30 m. In the western Pacific, off Guam and off Okinawa in the shallows from January to May, and the resultant eggs hatch in 38 to 40 days. It is diurnal species which appears to mesmerise its prey by using a display consisting of a series of rhythmic colour bands running along its body. It preys on fishes and crustaceans and it is known to prey on shrimp and prawns of the genus Palaemon. Breeding males are territorial and defend a coral head, typically Porites, the females lay eggs following mating in the territory of the male. Their courtship is highly ritualized and stereotyped, and like their hunting behaviour it includes striking visual displays. The males frequently guard the females, defending them from other males. The male and female mate head-to-head, the male placing the spermatophores in the buccal membrane of the female below to the mouth. After laying the eggs harden and are very hard to remove from the coral on which the female laid them. After hatching the young cuttlefish start to hide among the coral and the associated coral rubble where they often mimic mangrove leaves, their coloration and posture impersonating the leaf structure with a stem, ribs and a scattering of black spots.

Lifestyle

Diet and Nutrition

Mating Habits

MATING BEHAVIOR
PREGNANCY DURATION
38 to 44 days
BABY CARRYING
10 to 30
INDEPENDENT AGE
1 minutes

Population

References

1. Sepia latimanus Wikipedia article - https://en.wikipedia.org/wiki/Sepia_latimanus
2. Sepia latimanus on The IUCN Red List site - https://www.iucnredlist.org/species/162505/904969

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