Reef Fish
Giant Moray Eel
Gymnothorax javanicus · Bony fish — family Muraenidae (moray eels); the largest moray by mass on Indo-Pacific reefs
The open mouth reads as menace but is only breathing — morays pump water over their gills by gaping, and the giant moray spends daylight doing exactly that from a favorite crevice. It is the largest moray on Indo-Pacific reefs, thick as a diver's thigh, patterned in leopard spots that darken with age. Cleaner wrasses and shrimp work inside the open jaws at station after station; hang back and let the appointment finish. In the Red Sea, giant morays have been documented hunting cooperatively with roving coral groupers, the grouper signaling over a hidden fish and the eel flushing it out. Bites almost always trace back to feeding attempts or hands placed into holes. Look into a crevice before you brace on anything, and keep fingers off the reef.
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 |
|---|---|---|---|
| Sharm El Sheikh & Ras MohammedEgypt | Resident — seen on most dives | 年間を通じて | |
| North & South Malé AtollsMaldives | Resident — seen on most dives | 年間を通じて | |
| Sipadan & MabulMalaysia | Resident — seen on most dives | 年間を通じて | |
| PalauPalau | Resident — seen on most dives | 年間を通じて | |
| Cairns & the Ribbon ReefsAustralia | Resident — seen on most dives | 年間を通じて | |
| Hurghada & El GounaEgypt | Resident — seen on most dives | 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: Crevices, overhangs, and wreck recesses on lagoon and seaward reefs; a favored hole is reused for long periods.
分布域: Indo-Pacific and Red Sea, from East Africa to French Polynesia and southern Japan.
生態・行動: Gapes rhythmically to breathe, holds still for cleaner wrasses and shrimp working inside the mouth, and in the Red Sea has been documented hunting cooperatively with roving coral groupers.
食性: Fishes and occasionally crustaceans, mostly hunted at night by scent along the reef.
サイズ: 目安は 1.8 m; 確認済みの最大記録 3.0 m (total length; heavy-bodied, with large adults approaching 30 kg).
出会ったときの正しいふるまい方
Give cleaner stations room to finish, approach the crevice from the front at an unhurried pace, and keep bare hands off the reef around any occupied hole.
保全
Widespread and not considered threatened; large individuals are a known ciguatera risk and are rarely fished.
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