Turtles
Loggerhead Turtle
Caretta caretta · Marine reptile — family Cheloniidae
The loggerhead is the heavyweight journeyman of the turtle world — thick-necked, barrel-bodied, its outsized amber head built around jaws that crack conch like walnuts. Divers meet it in less glamorous places than its reef cousins: trudging across shell hash off Florida, wedged on a North Carolina wreck, cruising sandy gutters at Sodwana ahead of summer nesting. What it lacks in delicacy it repays in presence; a big female pushing past resembles slow-moving furniture and utterly ignores you. Its hatchlings ride ocean gyres for years — the 'lost years' — before returning to coastal shallows, one of the great migration stories in the sea.
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 |
|---|---|---|---|
| Florida KeysUnited States | Resident — seen on most dives | 年間を通じて | |
| Sodwana BaySouth Africa | Seasonal — reliable in season | Nov–Feb | |
| Malta & GozoMalta | Occasional | 年間を通じて | |
| North Carolina Outer BanksUnited States | Occasional | May–Sep |
ベストな月、一目でわかる
| 月 | 安定して出会える目的地 |
|---|---|
| January | Florida Keys · Sodwana Bay · Malta & Gozo |
| February | Florida Keys · Sodwana Bay · Malta & Gozo |
| March | Florida Keys · Malta & Gozo |
| April | Florida Keys · Malta & Gozo |
| May | Florida Keys · Malta & Gozo · North Carolina Outer Banks |
| June | Florida Keys · Malta & Gozo · North Carolina Outer Banks |
| July | Florida Keys · Malta & Gozo · North Carolina Outer Banks |
| August | Florida Keys · Malta & Gozo · North Carolina Outer Banks |
| September | Florida Keys · Malta & Gozo · North Carolina Outer Banks |
| October | Florida Keys · Malta & Gozo |
| November | Florida Keys · Sodwana Bay · Malta & Gozo |
| December | Florida Keys · Sodwana Bay · Malta & Gozo |
理解を深める
ハビタット: Hard bottoms, wrecks, ledges, and open shelf waters; less reef-bound than greens or hawksbills
分布域: Temperate and subtropical oceans worldwide — the US Atlantic coast, Mediterranean, southern Africa, Oman, Japan, and eastern Australia hold major nesting populations
生態・行動: A powerful, big-headed cruiser often met plodding across open sand or hauled up on a wreck deck like a boulder with flippers. Less site-faithful underwater than reef turtles, it covers ocean basins between feeding and nesting grounds; barnacle-crusted shells testify to the mileage.
食性: Hard-shelled prey — conch, whelks, crabs, and urchins — crushed with massive jaw muscles housed in the oversized head
サイズ: 目安は 0.9 m; 確認済みの最大記録 1.1 m (carapace length; a heavily built turtle commonly well over 100 kg).
出会ったときの正しいふるまい方
Standard turtle rules: no touching or riding, clear path to the surface, and extra distance during nesting season near mating pairs, which are focused and easily stressed.
保全
Vulnerable; longline and trawl bycatch remains the central threat, answered in part by hook and excluder-device rules, while beach protection has stabilized several nesting populations.
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