Cold Water
Australian Giant Cuttlefish
Sepia apama · Cephalopod mollusk, family Sepiidae; the largest cuttlefish species
Every austral winter the upper Spencer Gulf hosts the only known dense breeding aggregation of cuttlefish anywhere: tens of thousands of Sepia apama packed onto a few kilometers of shallow rocky reef near Whyalla, in green water that can drop below 12 °C. Males outnumber females several times over, so the reef becomes a tournament: meter-long heavyweights strobing zebra patterns at rivals while smaller sneaker males dim their colors, tuck their arms, and pass as females to slip through the cordon. It all happens in two to eight meters, snorkel-accessible, roughly May through August with a June–July peak. Across the rest of southern Australia the species lives as solitary, frankly curious reef residents that study divers as openly as they are studied. Bring drysuit-grade insulation, move slowly, and touch nothing: these animals breed once and die.
어디서 언제 볼 수 있나
"상주종"은 해당 목적지에서 대부분의 다이빙 시 만날 수 있다는 뜻이고, "계절종"은 표기된 달에 안정적으로 출현한다는 뜻입니다. 그 외의 생물은 계획이 아닌 보너스로 여기세요.
| 목적지 | 신뢰도 | 월 | 참고 사항 |
|---|---|---|---|
| South AustraliaAustralia | Seasonal: reliable in season | May–Aug |
한눈에 보는 최적의 달
| 월 | 믿을 수 있는 다이빙 명소 |
|---|---|
| May | South Australia |
| June | South Australia |
| July | South Australia |
| August | South Australia |
이해하기
서식지: Temperate rocky reef, kelp, and seagrass; the famous breeding aggregation packs onto a few kilometers of shallow stone reef in the upper Spencer Gulf.
범위: Southern Australian coast from Queensland's border waters around to Western Australia, including Tasmania.
행동 특성: Solitary and curious most of the year; each austral winter tens of thousands converge near Whyalla to breed, males dueling in color while smaller sneaker males dim their patterns and pass as females to reach mates.
먹이: Crabs, shrimp, and fishes taken with ambush patience and tentacle strikes.
크기: 보통 0.4 m; 최대 기록 수심 0.5 m (mantle length; total length approaches 1 m and big males exceed 10 kg).
이 생물 주변에서의 행동 요령
Thick exposure protection, slow fins, and no touching at the aggregation: the animals die after breeding, and every disrupted pairing spends a genuine last chance. Follow local sanctuary-zone rules.
보존
Assessed Near Threatened; the Whyalla aggregation crashed in the early 2010s before rebounding under fishing closures and a sanctuary zone that remain load-bearing.
관련 다이브 사이트 목록
강조 표시된 사이트는 편집팀이 해당 종에 대해 직접 등록한 곳이며, 숫자는 1990년 이후 사이트 기준 약 5km 이내에서 기록된 GBIF 출현 건수입니다.
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