Rays
Mobula (Devil) Ray
Mobula spp. · Cartilaginous fish, family Mobulidae
A mobula school in full procession is one of the sea's great crowd scenes: hundreds or thousands of small devil rays stacked wing to wing, banking in unison so the formation flickers black-white-black as bellies catch the light. Off Baja California in spring the schools stretch beyond sight, and their acrobatics, rays flinging themselves skyward to land with a crack, turn boat rides into spectacle. At the Azores, deep-bodied sicklefin devil rays circle seamount summits in stately squadrons instead. The gill-plate trade that hammered mantas hits these smaller mobulids just as hard, and every species in the genus now carries international trade protection.
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 |
|---|---|---|---|
| Sea of Cortez & Cabo PulmoMexico | Seasonal: reliable in season | Apr–Jul | |
| The AzoresPortugal | Seasonal: reliable in season | Jul–Sep | |
| Galápagos IslandsEcuador | Occasional | 年間を通じて | |
| Socorro & the RevillagigedosMexico | 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 coastal waters and offshore banks; surface schools by day, with tagged animals making extreme deep dives at night
分布域: Warm oceans worldwide; the great schooling spectacles are in Mexico's Sea of Cortez, with sicklefin devil ray aggregations at the Azores' seamounts and scattered schools through the tropics
生態・行動: The manta's smaller, more restless cousins: horned cephalic fins, swept wings, and a taste for aggregation. Munk's devil rays off Baja form schools of thousands that ripple the surface, and their habit of launching into flips and belly-flops meters above the water remains only partly explained. Encounters are mostly snorkel drifts alongside moving schools.
食性: Zooplankton and small schooling fish strained from the water in coordinated feeding runs
サイズ: 目安は 1.1 m; 確認済みの最大記録 3.7 m (disc width; spans the genus: schooling Munk's devil rays average about a meter, while sicklefin devil rays exceed 3 m).
出会ったときの正しいふるまい方
Slip into the water quietly ahead of a school's path rather than dropping onto it, no chasing or free-dive bombing through the formation, and follow local swim-with rules. Encounters are snorkel-only with most operators.
保全
Every Mobula species assessed is threatened (mostly Vulnerable or Endangered) from gill-plate fisheries and purse-seine bycatch; all are on CITES Appendix II.
目撃情報で知られるダイブサイト
ハイライト表示のサイトは編集部がこの生物種の記録地として登録したもので、数字は1990年以降にサイトから約5km以内で記録されたGBIFの出現件数です。
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Wildlife of Monterey | New film in our auditorium
Live Aviary Cam | Monterey Bay Aquarium
Live Aviary Cam | Monterey Bay Aquarium
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