Cephalopods
Common Reef (Day) Octopus
Octopus cyanea · Cephalopod mollusk — family Octopodidae; the big day-active octopus of Indo-Pacific reefs, called he'e in Hawaii
This is the octopus most tropical divers actually meet, because it breaks the family rule and hunts by day. A big day octopus flows across the reef as a self-editing special effect — skin texture spiking into algae tufts, color rippling from mottled brown to bone white in under a second, a passing-wave pattern flickering as it moves. Watch a hunt: the animal balloons its web over a coral head and flushes whatever bolts, while jacks or a grouper often shadow it to pick off escapees, one of the reef's neatest hunting partnerships. Dens are readable by the midden of emptied crab shells at the door. Sit still three meters out and curiosity frequently wins, an arm tip arriving to inspect a strobe arm. Let it explore; snatching gear back teaches the animal that divers end hunts.
在哪里、什么时候能见到
"常驻"表示在该目的地潜水时大多数情况下都能遇见它们；"季节性"表示在所列月份内可靠出现；其他任何情况都是意外惊喜，而非计划中的保障。
| 目的地 | 可靠性 | 月份 | 备注 |
|---|---|---|---|
| Sharm El Sheikh & Ras MohammedEgypt | Resident — seen on most dives | 全年皆宜 | |
| North & South Malé AtollsMaldives | Resident — seen on most dives | 全年皆宜 | |
| Sipadan & MabulMalaysia | Resident — seen on most dives | 全年皆宜 | |
| Kona, HawaiʻiUnited States | Resident — seen on most dives | 全年皆宜 | |
| MoalboalPhilippines | Resident — seen on most dives | 全年皆宜 | |
| Zanzibar & MnembaTanzania | Resident — seen on most dives | 全年皆宜 |
最佳月份一览
深入了解
栖息地: Coral reef and reef flat, denning in holes marked by middens of emptied crab shells.
分布范围: Indo-Pacific and Red Sea, from East Africa to Hawaii and French Polynesia.
习性: Hunts by day — rare among octopuses — flowing between coral heads and ballooning its web over them; jacks and groupers often shadow the hunt to pick off escapees.
食性: Crabs above all, plus shrimp, mollusks, and small fishes trapped under the flared web.
体型: 通常约 0.6 m; 记录深度可达 1.0 m (arm-span; mantle to about 16 cm, large animals several kilograms).
与它相处时的行为守则
Settle a few meters out and hold still; curiosity often brings an arm tip to you. Never grab, pry at a den, or block the animal's line of retreat.
保育
Least Concern and fast-growing, though heavily fished for food across much of its range; healthy reef populations rebound quickly.
以此著称的已标注潜点
观看
来自官方渠道
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