Invertebrates
Giant Clam
Tridacna gigas · Bivalve mollusk, family Cardiidae, subfamily Tridacninae; the largest living bivalve
A mature giant clam is a reef landmark: a meter-plus of fluted shell holding a mantle patterned in electric blues, greens, and golds, no two animals alike. The colors come partly from iridescent cells managing light for the clam's real engine (symbiotic algae farmed in its tissues), which is why giants sit in the sunlit shallows gaping wide by day. Old stories about man-trap clams are folklore; a disturbed animal vents and closes slowly, and the largest cannot seal at all. The genuine drama is reproductive, broadcast spawning that fogs whole lagoon patches with gametes. Tridacna gigas has been fished out of much of its former range for meat and shell, and many animals divers meet today, notably in Palau, descend from hatchery restocking. Find the paired siphons, note the sunburst mantle pattern, and keep fins well clear.
어디서 언제 볼 수 있나
"상주종"은 해당 목적지에서 대부분의 다이빙 시 만날 수 있다는 뜻이고, "계절종"은 표기된 달에 안정적으로 출현한다는 뜻입니다. 그 외의 생물은 계획이 아닌 보너스로 여기세요.
| 목적지 | 신뢰도 | 월 | 참고 사항 |
|---|---|---|---|
| Cairns & the Ribbon ReefsAustralia | Resident: seen on most dives | 연중 가능 | |
| PalauPalau | Resident: seen on most dives | 연중 가능 | |
| Raja AmpatIndonesia | Resident: seen on most dives | 연중 가능 | |
| Sipadan & MabulMalaysia | Resident: seen on most dives | 연중 가능 | |
| YapFederated States of Micronesia | Resident: seen on most dives | 연중 가능 |
한눈에 보는 최적의 달
| 월 | 믿을 수 있는 다이빙 명소 |
|---|---|
| January | Cairns & the Ribbon Reefs · Palau · Raja Ampat · Sipadan & Mabul · Yap |
| February | Cairns & the Ribbon Reefs · Palau · Raja Ampat · Sipadan & Mabul · Yap |
| March | Cairns & the Ribbon Reefs · Palau · Raja Ampat · Sipadan & Mabul · Yap |
| April | Cairns & the Ribbon Reefs · Palau · Raja Ampat · Sipadan & Mabul · Yap |
| May | Cairns & the Ribbon Reefs · Palau · Raja Ampat · Sipadan & Mabul · Yap |
| June | Cairns & the Ribbon Reefs · Palau · Raja Ampat · Sipadan & Mabul · Yap |
| July | Cairns & the Ribbon Reefs · Palau · Raja Ampat · Sipadan & Mabul · Yap |
| August | Cairns & the Ribbon Reefs · Palau · Raja Ampat · Sipadan & Mabul · Yap |
| September | Cairns & the Ribbon Reefs · Palau · Raja Ampat · Sipadan & Mabul · Yap |
| October | Cairns & the Ribbon Reefs · Palau · Raja Ampat · Sipadan & Mabul · Yap |
| November | Cairns & the Ribbon Reefs · Palau · Raja Ampat · Sipadan & Mabul · Yap |
| December | Cairns & the Ribbon Reefs · Palau · Raja Ampat · Sipadan & Mabul · Yap |
이해하기
서식지: Sunlit reef flats, lagoon floors, and upper slopes, shallow because its symbiotic algae need strong light.
범위: Coral Triangle, Micronesia, and the Great Barrier Reef; fished out of much of its former Indo-Pacific range, with reintroductions in several countries.
행동 특성: Sessile after settlement; gapes its patterned mantle to the sun by day, contracting and slowly closing when shadowed. Spawns by broadcast, fogging the water with gametes.
먹이: Mostly sugars from symbiotic algae farmed in the mantle, topped up by filter feeding.
크기: 보통 1.0 m; 최대 기록 수심 1.3 m (shell length; the largest reliably weighed animals exceed 200 kg).
이 생물 주변에서의 행동 요령
Keep fins, gauges, and hands clear of the mantle and siphons; shadow the animal as little as possible and never test the closing reflex.
보존
Listed Vulnerable under a 1996 assessment widely considered out of date (recent studies argue it is far more threatened), locally extinct in parts of its range, and traded under CITES Appendix II; hatchery programs restock several countries.
관련 다이브 사이트 목록
강조 표시된 사이트는 편집팀이 해당 종에 대해 직접 등록한 곳이며, 숫자는 1990년 이후 사이트 기준 약 5km 이내에서 기록된 GBIF 출현 건수입니다.
시청하기
공식 채널에서 제공
Wildlife of Monterey | New film in our auditorium
Live Aviary Cam | Monterey Bay Aquarium
Live Aviary Cam | Monterey Bay Aquarium
영상은 크리에이터 본인 채널에 대한 임베드 링크입니다. 저희는 아무것도 직접 호스팅하지 않으며, 모든 출처를 표기합니다.