Goldfish memory

Is it true that the humble goldfish has a memory of about five seconds? I suppose it would probably be a good thing if it were so as I'm not sure how many of them would choose to commit hare-kiri by flipping out of the bowl instead of going round in yet another circle.

But, is there a point to this random musing on the life of a goldfish. Well yes, it's an example of just how my brain is functioning, or not, at the moment.
Since having James I must admit that my brain, that once managed to hold its own in a room full of national journalists and still get an exclusive story, now can't always even manage to remember to fill the kettle up before switching it on.
It means, if anyone's still keeping up with this ramble, that I keep forgetting about this blog.