Sometimes Truth is Stranger than Fiction

From a recent article in the Economist:

Readers with long memories may recall GeneDupe's previous attempt to break into the pet market, the Real Goldfish (see article). This animal was genetically engineered to deposit gold in its skin cells, for that truly million-dollar look. Unfortunately Dr Fril, a biologist, neglected to think about the physics involved. The fish, weighed down by one of the heaviest metals in existence, sank like a stone, as did the project.