Not to be confused with the slang term for certain types of Currency.
Shiners are a type of giant amoeba (some four feet in diameter) that has evolved to live beyond the water, creeping into damp swamp castles and half-flooded crypts. Once inside, they coat surfaces with their thin oily flesh, giving the item a shiny appearance, hence the name. This makes paintings, furniture, and jewellery seem more preserved and thus more valuable, drawing the curious or greedy towards them, whereupon the shiner shoots out burning acid. Humans are usually strong enough to survive the attack, but many a tomb robber with a ruined face will tell you that all that glitters should not be trusted.[1a]