25 Pence - Elizabeth II Sea Life, Orange Fish - silver plated

Saint Helena's 25 pence denomination has no circulation function — the territory uses the pound sterling for everyday commerce, and these pieces are produced exclusively for the collector market through contracted minting arrangements. The sea life series of which this is a part was issued against the backdrop of renewed international attention on South Atlantic marine conservation, though the coins themselves have no regulatory or funding connection to those programs.

Silver-plated copper-nickel is the telling detail here: it is the production tier one step below genuine silver strikes from the same series, typically sold at lower price points to broaden the collector base.