That's a small pack of escorts. Then again, I love Torpedo boats and Tyranid Kraken, so I'm probably biased.
My local wargaming group did a BFG campaign this past winter/spring. Had a lot of fun - Chaos, Marines, Tyranids, 'Crons, Imperials, and Orks all running around. Some of us had minis lying around from ages ago (one guy had a whole Chaos fleet, in boxes, in his attic!), my Tyranids were pretty much scratch-built (green stuff and Bug bitz - easiest BFG fleet to get!), and some guys got stuff on Ebay. I'd only run Imperials/Marines before...Tyranids are a very entertaining force to play as. There's nothing quite like
eating the enemy fleet.