I'm going to have to chime in on the side of Aspects to deal with this. My view on it is, FATE is just not granular enough to deal with nit-finicky things of this like. In the example of fish, or dogs, well... the High Concepts would be Laser-Toting Shark, and Trained Wardog. Both imply lack of thumb-fu.
That tells everyone that if you're in water, the shark is a deadly laser-totin' machine, and if you get run down by one of them trained wardogs, he's gonna be gnawing on your hip bone. Poking a well-manicured thumb in your eye... meh, not so much.
The best example in support I can think of is how a Temple Dog (OW80) is mentioned as a possible PC option. And I also like what the blue sticky says: Bit of a RP challenge, but some folks might be up for it!