25 Cents - Elizabeth II Tiktaalik

Tiktaalik roseae was discovered on Ellesmere Island, Nunavut, in 2004 by a team led by Neil Shubin and Farish Jenkins — a find significant enough to reshape understanding of the fish-to-tetrapod transition. The specimen dates to roughly 375 million years ago. This coin appeared a decade after that discovery, part of the RCM's ongoing prehistoric creatures series targeting the collector market rather than circulation.

At 13.8 g in copper-nickel, it never saw a till.