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Sepia officinalis, commonly known as the common cuttlefish, is a highly intelligent and visually striking cephalopod belonging to the order Sepiida. It is characterized by its internal shell (cuttlebone), eight arms, and two longer tentacles used for prey capture. Renowned for its remarkable ability to change skin color and texture rapidly for camouflage and communication, it is a master of disguise in its marine environment. This species plays a significant ecological role as both a predator and prey item in coastal ecosystems.
Características físicas
- Formato do corpo
- rounded
- Coloração
- Highly variable, capable of rapid changes. Typically mottled browns, greys, and whites for camouflage. Can display vibrant patterns of reds, oranges, and blues during courtship or threat displays. Underside is generally lighter.
- Tipo de escama
- none
- Posição da boca
- terminal
- Características distintivas
- Large, W-shaped pupils, Eight arms with suckers in two rows, Two long, retractable tentacles with suckers at the club-like ends, Internal, porous cuttlebone (sepion) for buoyancy control, Fins running along the entire mantle margin
- Nadadeira dorsal
- Not applicable (cephalopod)
- Nadadeira caudal
- Not applicable (cephalopod)
- Nadadeira peitoral
- Not applicable (cephalopod)
- Nadadeiras características
- A continuous, undulating fin runs along the entire lateral margin of the mantle, used for propulsion and steering.
Dicas de identificação
Body Shape
Oval, flattened body with a broad, internal cuttlebone. The mantle is typically wider than it is long.
Fins
A distinctive undulating fin runs continuously around the entire margin of the mantle, unlike squid which have triangular or rhomboid fins at the posterior end.
Eyes
Large, prominent eyes with a characteristic W-shaped pupil.
Coloration and Texture
Exceptional ability to change skin color and texture (papillae) rapidly to match surroundings or communicate. This is a key identifier.
Cuttlebone
If found washed ashore, the internal, calcified, porous cuttlebone is a definitive identifier. It is oval and has fine, wavy striations.
Habitat
- Tipo de água
- saltwater
- Profundidade
- Typically found in shallow coastal waters, from the intertidal zone down to about 200 meters (650 feet), though occasionally deeper.
- Ambiente
- Prefers sandy or muddy bottoms where it can bury itself for camouflage, but also found in seagrass beds and rocky areas. Migrates to deeper waters in winter and shallower waters for spawning.
- Distribuição geográfica
- Eastern Atlantic Ocean, from the Baltic Sea and Norway south to South Africa, including the Mediterranean Sea. Also found in the Red Sea.
Informações sobre aquário
- Nível de cuidado: expert
- Temperamento: territorial
- Alimentação: carnivore
- Tamanho mínimo do aquário: 500 liters (130 gallons) for a single adult
- Temperatura: 15-22°C (59-72°F)
- Nível de pH: 8.1-8.4
- Dureza da água: 1.023-1.026 specific gravity
- Compatibilidade: Not suitable for community tanks; best kept in a species-specific tank due to predatory nature and specific environmental needs. Can be kept in pairs or small groups if tank size permits and individuals are introduced carefully.
- Requisitos especiais: Requires a well-established, mature aquarium with excellent filtration and stable water parameters. Substrate should be soft sand for burrowing. Live rock and ample hiding places are essential. Requires a constant supply of live food. Sensitive to water quality fluctuations and stress. Not recommended for novice aquarists.
Informações no ambiente natural
- Estado de conservação: least concern
- Sazonalidade: Spawning season typically occurs in spring and early summer (March-July) in temperate waters, leading to increased catches during these months. Availability can vary regionally.
- Preço de mercado: Varies significantly by region and season, often high due to demand for culinary use.
- Importância comercial: high
- Sabor: Mild, slightly sweet, and briny flavor.
- Textura: Firm and chewy when cooked properly, can become tough if overcooked.
- Métodos de preparo: Grilled, Fried, Stewed, Baked, Used in paella and risottos
- Valor nutricional: Rich in protein, low in fat, good source of iron, selenium, and B vitamins.
Fatos principais
Master of Camouflagebehavior
Sepia officinalis can change its skin color and texture in less than a second, mimicking rocks, sand, or algae with astonishing precision. This ability is used for both predator avoidance and ambush predation.
Ink Defenseinteresting
When threatened, the common cuttlefish releases a cloud of dark ink (sepia) to confuse predators, allowing it to escape. This ink was historically used as a pigment for writing and drawing.
Complex Eyesightamazing
Cuttlefish have highly developed eyes with W-shaped pupils that allow them to see polarized light, which is invisible to humans. This helps them detect prey and communicate with other cuttlefish.
Internal Shellevolution
Unlike most molluscs, the common cuttlefish has an internal shell, the cuttlebone, which is porous and filled with gas. It uses this structure to precisely control its buoyancy in the water column.
Short Lifespanbehavior
Despite their intelligence and complex behaviors, common cuttlefish typically have a short lifespan, usually 1-2 years in the wild, dying shortly after spawning.
Informações de segurança
Manusear com cuidado- Nível de segurança: caution
- Venenoso: Não
- Comestibilidade: edible
- Observações de manuseio: While not venomous, cuttlefish can squirt ink as a defense mechanism, which can stain. They also possess a sharp beak (mandibles) located in the center of their arms, capable of delivering a painful bite if provoked or handled carelessly. It is best to observe them without direct physical contact. If handling is necessary (e.g., for scientific study), wear protective gloves and exercise caution.
Espécies similares
Needle Cuttlefish
Sepia aculeata
Generally smaller, with a more elongated body and a distinct spine at the posterior end of the cuttlebone. Geographic range is primarily Indo-Pacific.
Elegant Cuttlefish
Sepia elegans
Smaller in size, with a more slender body and a narrower cuttlebone. Often has distinct iridescent spots or lines on the mantle. Found in the Mediterranean and Eastern Atlantic.
Squid (various species)
Order Teuthida
Squid have a more torpedo-shaped body, a chitinous pen (not a calcified cuttlebone), and typically have two triangular or rhomboid fins at the posterior end of the mantle, not a continuous fin along the entire margin.
Classificação científica
- Reino
- Animalia
- Filo
- Mollusca
- Classe
- Cephalopoda
- Ordem
- Sepiida
- Família
- Sepiidae
- Gênero
- Sepia
- Espécie
- Sepia officinalis
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