Largest clam
The current largest clam record is 750 lb, held by Giant clam (Tridacna gigas) specimen collected off Ishigaki Island, set on January 1, 1956. Last checked October 14, 2026.
750
lb
Giant clam (Tridacna gigas) specimen collected off Ishigaki Island
- Holder
- Giant clam (Tridacna gigas) specimen collected off Ishigaki Island
- Record
- 750 lb
- Metric
- 340 kg
- Exact figure
- Just over 340 kg (about 750 lb) alive
- Location
- Off Ishigaki Island, Okinawa, Japan
- Date set
- January 1, 1956
- Recognized by
- Guinness World Records
- Last checked
- October 14, 2026
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