First there was i-dog, then there was i-pup but that was last year and, frankly, we're tired of canines. So welcome the new friendly iPod accessory: i-fish. i-fish is like its four-pawed cousin but its tail sways rather than wags. Plug in your music player of choice and it will pump out your tunes via its built-in speaker, while seven multicoloured lights jump to the beat. Unplug the music and the fish can play its own soothing wave or bubble sounds. Give it a stroke and its lights will react to your every caress. It's predicted to be a big hit this Christmas but we can't help being reminded of Big 'Billy' Bass, the singing fish – and that's not a good memory.