150 Dollars - Elizabeth II Atlantic Walrus, platinum

Canada's platinum bullion and collector series launched in 1990 with the maple leaf, but the wildlife-themed issues that followed in the early 2000s drew on Canada's long tradition of natural history coinage. The Atlantic walrus population, concentrated around the Gulf of St. Lawrence and the eastern Arctic, had been subject to Inuit subsistence hunting for millennia and faced sharp pressure from commercial hunting in the 19th century — the species never fully recovered its pre-contact numbers in Atlantic Canadian waters.

The .9995 purity specification was a deliberate one-up on the original platinum maple leaf's .9995 standard maintained since the series began, keeping the Royal Canadian Mint's platinum products among the purest available from any sovereign issuer at the time.