Who first came up with the idea of feeding goldfish with ant eggs?

The long-running series in which readers answer other readers’ questions on subjects ranging from trivial flights of fancy to profound scientific concepts

Who first came up with the idea of feeding goldfish with ant eggs? Given that there must have been ant eggs already in the shops, what were they used for before?

Brian Smith, Berlin

• Post your answers – and new questions – below or email them to nq@theguardian.com