Leatherback sea turtles can weigh 550 to 1,500 pounds (250 to 700 kilograms), making them the largest living turtles.
Notes on verification
Confirmed by multiple authoritative independent sources (NPS, NOAA, Wikipedia citing academic sources), with only minor variation in exact weight ranges across sources. [cascade flags: wikipedia_dropped_other_sources_exist | tier=bronze indep_score=0.539 clusters=2 claim_tier=notable]
Sources
- 5 Winners and Losers on New “Red List” of World's Rarest ... (seed:environment_and_wildlife)
- https://www.nps.gov/caha/learn/nature/leatherbackseaturtle.htm (corroboration)
- https://oceanservice.noaa.gov/facts/leatherback.html (corroboration)
- https://www.fisheries.noaa.gov/species/leatherback-turtle (corroboration)