Beedle the Bard SPOILERS\Animagi commentary

[Carol]

No: HPFGUIDX 185190

Zanooda:
> > Also, when Viktor Krum transformed himself into a shark, he
remembered very well who he was and what mission he had to accomplish.
Was it because he only partially transformed? It's not very clear to me.
> 
> Pippin:
> Bagman's commentary is that Krum's transfiguration was incomplete.
It might have been an incomplete animagus transformation.

Carol responds:

We'd know if he was a registered Animagus--or an illegal one. (Imagine
being a shark Animagus--a fish out of water for sure!) IIRC, he used a
wand to Transfigure himself, which mean it wasn't true Animagic (or
whatever the proper term is).

FWIW, I've always thought that the incomplete Transfiguration was
deliberate. After all, with a shark's head, he can breathe under water
(and scare any merpeople or grindylows that might try to attack him),
but he also needs hands to rescue Hermione. Presumably, shark head or
not, he retains his own mind or he wouldn't remember his task, not to
mention that the hostages might end up as his dinner.

Carol, too tired to remember the point of this post