Thanks for your advice, Steve! I'm still very much of a novice so I really do appreciate it!
The schools of hammers were usually at 20-30m in the blue and sometimes they almost reached the surface. So all in all it wasn't that bad the only downside being that except for one occasion they stayed quite far away so you could just about see them, which obviously isn't great for shooting...
The tiger was maybe 3-5m away from me. The shot could have been a lot better though, but this happened on day 2 when I was still fiddling with the settings quite a lot
I was in fact thinking of taking some of the footage to do something a little more arty for some competitions, but I haven't got around to starting work on that project just yet.