Acanthosepion esculentum
A short-lived, migratory cuttlefish of the Western Pacific.
Acanthosepion esculentum, commonly known as the golden cuttlefish, is a carnivorous species of cuttlefish in the family Sepiidae found along the coasts of the Western Pacific Ocean. It is notable for its very short lifespan, seasonally migratory lifestyle, and its role as a key prey species for various marine predators, as well as for facing environmental challenges from over-fishing and habitat disruption.
Quick Facts
- Genus
- Acanthosepion
- Species
- esculentum
Facts from the source article.
Lore & Background
The golden cuttlefish inhabits coastal waters from South Korea, China, and Japan in the north to the Philippines in the south, living at depths of 10–100 metres on sandy, sediment-layered sea floors. It requires water temperatures around 20°C and migrates pelagically from deeper regions to shallower waters during mating season, with breeding grounds determined by food abundance, microalgae, and sea floor structures for egg attachment. As a juvenile, it feeds on shrimp, crabs, and small crustaceans; as an adult, it adds fish and shows cannibalistic behavior, with known prey including Engraulis japonius and Squilla oratoria. The species uses its beak to break prey into smaller pieces and is itself preyed upon by whales, seals, birds, and fish.
Reader's Guide
Acanthosepion esculentum holds significance as a commercially fished species, having surpassed Sepiella maindron in popularity by the 1990s. It is harvested for its mantle meat and for the medicinal properties of its cuttlebone in Chinese medicine. Fishing techniques such as cage fishing and trawling disrupt its benthic habitat. Climate change has further impacted the species by raising winter water temperatures, causing earlier migrations to breeding grounds, leading to higher mortality and worsened breeding conditions as many individuals have not yet reached full maturity. In response, provinces in Northern China have initiated annual releases of captive-raised golden cuttlefish and placed artificial structures on the sea floor for egg attachment to boost population numbers. The species plays a key ecological role as both predator and prey in its marine ecosystem.
Did You Know?
- The oldest documented golden cuttlefish lived only 152 days.
- Adult golden cuttlefish have a diet that is 50% crustaceans and 50% juvenile cuttlefish and fish.
- Females often mate with multiple males and retain sperm for later fertilization, leading to sperm competition.
- Males use their arms to remove sperm packets from other males off a female's buccal membrane.
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