For instance, i've seen a lot of media recently of just the animals name; eg. Kimya (the gorilla). So the photo of 'Kimya' is not gonna come up in the search. That's my point.
I'll just requote my edit then-
Edit: Though I'm thinking you are pointing more towards the handful of photos that are not labeled with helpful attributes - but really, who's going to go put all those tags in throughout the gallery? There's many thousands of photos on Zoochat that lack tags, nobody wants to go do it nor do I think anyone will.