Cephalopods
Flamboyant Cuttlefish
Metasepia pfefferi · Cephalopod mollusk — family Sepiidae; a dwarf cuttlefish with a reduced internal cuttlebone
A flamboyant cuttlefish crossing a black-sand flat looks like a wind-up toy in ceremonial dress — a fist-sized animal ambling on two arm tips and skin flaps because its reduced internal cuttlebone barely floats it, pulsing waves of maroon, yellow, and white down its body as it goes. The pageant reads as warning coloration: laboratory work has reported significant toxins in its muscle, a rarity among cuttlefish, and the animal behaves like something with nothing to prove, hunting tiny shrimp and fish in open daylight with a deliberate tongue-flick strike of its feeding tentacles. At rest it fades to mud brown and simply disappears against the silt. Females glue eggs under coconut shells and rubble, and hatchlings emerge as perfect miniatures already flashing the family colors. It is a muck signature — ask the guides which slope has been producing.
どこで・いつ見られるか
「常駐（Resident）」とは、そのダイビングスポットでのほとんどのダイブで遭遇できることを意味します。「季節限定（Seasonal）」とは、記載された月に確実に見られることを意味します。それ以外の出会いはボーナスであり、計画の前提にはなりません。
| 目的地 | 信頼性 | 月 | メモ |
|---|---|---|---|
| Lembeh StraitIndonesia | Occasional | 年間を通じて | |
| AnilaoPhilippines | Occasional | 年間を通じて | |
| Banda Sea & AmbonIndonesia | Occasional | 年間を通じて | |
| Dumaguete, Dauin & Apo IslandPhilippines | Occasional | 年間を通じて | |
| Milne BayPapua New Guinea | Occasional | 年間を通じて |
ベストな月、一目でわかる
理解を深める
ハビタット: Open sand, silt, and mud flats of sheltered bays and muck slopes, usually walking rather than swimming.
分布域: Indo-Malayan region and northern Australia — Indonesia, Malaysia, the Philippines, and New Guinea.
生態・行動: Ambles across the bottom on two arm tips and skin flaps, pulsing waves of maroon, yellow, and white when hunting or alarmed; fades to mud brown at rest and vanishes.
食性: Small shrimp and fishes taken with a slow-motion stalk and a lightning strike of the feeding tentacles.
サイズ: 目安は 0.06 m; 確認済みの最大記録 0.08 m (mantle length).
出会ったときの正しいふるまい方
Stay low and behind its line of travel, keep strobes reasonable, and never lift shells or coconut halves — females glue eggs beneath exactly that kind of cover.
保全
Formally Data Deficient; a bottom-bound lifestyle on developable coastal seabeds is its main exposure.
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