Slowest growth rate (Animal kingdom)
Last updated: April 13, 2020 at 0:21 am
The deepsea clam (Tindaria callistiformis) grows as little as 8.4 mm (one-third of an inch) in 100 years. The growth rate of this very small saltwater bivalve was measured by radiometric dating, a.k.a. radioactive dating, which measures the abundance of a naturally occurring radioactive isotope and its decay products.