My first guess before E. faecalis was S. bovis
Buzz words like landlocked made me weirdly associate it to the word "cattle", there's no rationale why it just is. It's the same feeling when someone mentions penicillin and I think of oranges but never the other way around.
Then the word saline which is used at 6.5% NaCl growth to test between Enterococcus spp and S. bovis. This is all not factoring in CHROMagar. I'll read on it further.
S. bovis is also blue on the agar, but they have a different appearance compared to Enterococcus.
The organism in question is gram negative.
Yersinia enterolitica
Nope.
Yersinia pestis
Am I even getting close?
No. Colder.
Think waterborne.
Ok, before even coming up with Yersinia enterolitica, there was Aeromonas hydrophila but stool cultures and landlocked buzzwords made me not mention it first not being a common uropathogen.
Unfortunately, it's not Aeromonas, but that is more in line with stool, waterborne, etc.
Now, try salt water instead of fresh water.