It will really depend if you are still planning on getting a bigger tank Simon so for a BTA:
Tank needs to at leasr six months old and stable
Have T5 lighting at least
Be big enough to accomodate a Nem that is going to reach 12 inches within a year
Powerheads are covered
So, you see that your tank is currently not big enough - however, I had Bill in my 126 litre tank for approx six months before I moved him to the five footer. He did really well in that tank and grew very fast but I had my five footer to transfer him into.
If you bought a wee BTA, you could probably keep him in the current tank for a few months - but you will need to have the other tank planned and ready, probably within 4 - 6 months.
There is another consideration, your corals - the Nem may in his quest for a home kill them
If your corals are not stuck down, you could remove them to a holding tank whilst your nem finds a home - but to be honest, is it worth it! You could of course set-up the bigger tank now
So, it is do-able in your tank for a short space of time - is it wise - probably not!
Seffie x
Woops, you asked for a photo of Nems - here are mine Bill, Bill Jnr and Ben