"Oh." Was the first thing of which the young man could answer.
And after thinking it through, he agreed. "That's fair."
"Okay so the fish is... black?" It didn't take much intelligence to figure that portion out.
[Well it's in the name, so yes]
After that portion was well established, he slid towards one of the most reliable solutions when it came to finding new animals. It wasn't a method that guaranteed success, but it simply was the best available option.
Peeking at Osira, he questioned. "Do you know where I can find a... uh."
Well it took only that much time for the young one to forget the fish's name. Yet luckily, the system could refresh his memory. [Black ranchu goldfish]
Noticing that the grouper was a little pissed, he instantly continued the sentence. "Uh, I need to find a black ranchu goldfish."